Funny, I feel Genesis fanboys also guilty of in citing the a similar number titles like Thunderforce, Sonic, Moonwalker, Shinobi, and the Streets of Rage games. I can't help but feel too much stilt again the SNES in this thread.
While we're at it, you might as well bring up Master System games into the fold: "Yeah, see how this sounds sooo much better than SNES!"
Funny I do have a soft spot for the Wonder Boy/ Monster World games music, particularly MW IV, but that's because it avoids using the
BUTT UGLY NOTES OF THE GENESIS YAMAHA SYNTHESIZER entirely, and in fact tries to keep its composition clean as to avoid the typical "metalic twang" that affects so many poorly composed Genesis tracks...and trust me, there are a lot. (Well I guess that's what the Arranged Soundtrack is for.)
tl;dr - The best Genesis composers knew which particular instruments/pitches produced the god awful brown notes so they made sure to avoiding using such instruments in their composition. Sometimes though the twang is unavoidable: Gunstar Heroes still has a bit of it, and if it wasn't for GBA's low fidelity sound
this track might have sounded much much better with higher quality PCM samples, and I would've prefered it over the Genesis itteration.