KOTOKO vs Mami Kawada version 1.0

KOTOKO	Mami Kawada
Discography
vast, too vast	considerably less
Ballad
Some of KOTOKO's ballads are great, some tend towards fluffy nothingness. Because of her vast discography, some songs just end up bland, unoriginal, and mediocre. However, still a significant number of ballads by her shine and etch their memorable melodies. The great tunes are further amplified by KOTOKO's powerful, emotional vocals. Verdict: Lose Notable songs: went away, unsymmetry, Hane	With a less vast discography, Mami's ballads are almost all, if not all, great and tolerable at the very least. Her edge on this genre lies on her vocals: those chants, her softer tone, and most importantly, her delicate vibrato. A ballad need not offer over-the-top vocals brimming with power, thus, Mami's natural vocals suffice and are much suitable for this genre. Verdict: Win Notable songs: undelete, seed, portamento, Not fill
Rock
A genre that, undoubtedly, needs more badass, rough vocals. KOTOKO's alter ego in Outer gives us her punk rock side but this may not be for everyone's taste. As KOTOKO herself, though, a couple of rock songs are still up her sleeves, songs that boast of vocal strength and grit and varying tunes. Her vocals can definitely bring up hype and energy. Verdict: Draw Notable songs: Ao-iconoclast, UZU-MAKI, Bullshit!! Hard Problem!!	Soft vocals on a rock song? Yes? YES. It works, giving her the success that is JOINT. How she ends some verses with a breath exudes that rough edge. She may not have that much vocal power compared to KOTOKO, but the attitude, or even the vocal quality alone, matches a rock theme, nonetheless. Indeed, a different approach to a rock song but still not any less inferior.  Verdict: Draw Notable songs: JOINT, CLIMAX, masterpiece
Trance/Techno
KOTOKO has been with I've since almost the beginning, and, therefore, enjoyed the raw and fresh creativity of the group. This gave most of her older trance songs to be among the best in KOTOKO's career to date. More than that, her versatility shows, mixing trance and techno with ballad, rock, or pop but still turning out great. She won't be called the I've Queen if not for this genre, after all, back in the days.  Verdict: Win Notable songs: SCREW, Epsilon, resolution of soul, Re-sublimity	With considerably less songs in this genre at hand, there is less to consider. However, Mami Kawada still has a lot of great trance songs. The vocal flavor and versatility are there but, unlike KOTOKO, her trance songs' successes are mostly credited and dependent on the works of the producers.      Verdict: Lose Notable songs: SQUARE THE CIRCLE. Trill, PSI-missing, IMMORAL
Pop
Pop! Pop! Pop! Again, KOTOKO has lots of songs under this genre. And her versatility has proven how much her voice can also suit a pop song. Cheery, sometimes cutesy, or even melancholically pop-ish. Pop songs almost always lie average in comparison to other genres, and in here, KOTOKO and Mami share equally great potentials.   Verdict: Draw Notable songs: Onaji Sora no Shita de, Wing my Way, Loop-the-Loop	Upbeat pop? Check! Midtempo? Check! Mami's pop song prowess has been proven through time. She has been singing songs in this genre since her seed album. Pop songs are not too risky, and you could almost always never go wrong with pop but then again, there is also always the risk of being generic or bland. Nonetheless, her pop songs have been a nice go-to whenever, wherever.   Verdict: Draw Notable songs: INITIATIVE, eclipse, DREAM
Game themes KOTOKO undoubtedly has the most game tie-ups among the I’ve girls owing to the fact that she was the I’ve Queen. With years in the industry, she has assumed a brand name for herself. Generally, her game themes vary in genres, showing a multitude of her skills as an artist - one of the reasons why she deserve to dominate the I’ve Girls Best Compilation.   Mami Kawada may not have that much game tie-up, with only about one or two a year, but this was not at all a hindrance to what she can do, to what she can show. Quality over quantity. Her game themes are nowhere near as good as that of KOTOKO but all of them are good, tolerable, lovable.    Verdict: Win Notable songs: Restoration ~Chinmoku no Sora~, jihad, Imaginary affair Verdict: Lose Notable songs: IMMORAL, For our days, eclipse Anime themes KOTOKO still has the most anime tie-ups among the group. However, this is the case when quality was compromised over quantity. Her anime themes have mostly been fluffily ordinary and more mediocre in comparison with her game themes. Some turn out great and outstanding, but some are no more than uninteresting and unoriginal. Verdict: Lose Notable songs: Re-sublimity, being, Hayate no Gotoku! Mami Kawada prides on her success more on the anime music industry. Each tie-up shows us something different, to a certain extent. Improvement was apparent, and her style has been firmly established, a style that can cater to a wider set of audience. She has done well both in and out of her comfort zone. Verdict: Win Notable songs: JOINT, masterpiece, Hishoku no Sora, No buts! Live Performance
KOTOKO wins over Mami in this aspect, hands down. Each and every one of her live performances have been close to perfection, with some even surpassing that on the CD recording. Her songs generally offer more power and that is still apparent even when sang live. On top of that, she dances too! Her performance may be less interactive, but that doesn't make her less of a live performer. Verdict: Win	Mami Kawada's live singing career had a rough start. She went from the meek, timid singer easily run out of stamina to one that has fire, edge, and gives out an entertaining performance. She may fail to sing perfectly every time but she compensates that lack with her mobility onstage, her interactive attitude, and her fierce aura proving that she's more of a performer. Great enough.  Verdict: Lose
Versatility
KOTOKO is more versatile. She has probably delved into all genres in existence for music: pop, rock, ballad, punk, trance, techno, denpa, those mysterious types, and a combination of some genres here and there. Her ANIMAX MUSIX LIVE covers are further proof of this. It seems as if she can sing any song, her vocals flexible enough to meet the demands of various song types. Edge: Jack of all Trades	Admittedly, compared to KOTOKO, Mami Kawada is not as versatile. She is not as involved in much genres, nor as good in some. That may be the case, but she still excels in her genres of choice. She prides of consistency, coherence, and is famed for her songs that rarely disappoint. She is less prolific, yes, but when she does release a song, they're pretty much awaited for and ultimately satisfying. Edge: Mastery

This face-off has been on for long. It is somehow inevitable since KOTOKO and Mami Kawada have been partners in their earlier years, releasing split singles, singing for the same anime series. While comparison of the two may seem off or undesirable, this does not serve to distinguish which is the better artist, but instead, serves to show both of the artist's strengths and weaknesses. 

Both have their own styles, and genres of choice, and are both great in their own respects. At the end of the day, who we choose or prefer of the two depends on our tastes and subjectivity. This just serves as a rough guide to the capabilities of these two amazing artists. So, who do you prefer?