I don't know why so much of the conversation in this thread is about the Genesis sound chip, or comparisons against the SNES.
When the OP was only about SNES, and conversation can be had about that subject without so many direct comparisons. Or at least without always comparing to only one contemporary competitor, when there are so many more (even from previous or later generations) .
It's obvious to me some people can't handle technical commentary about SNES limitations, even if it's civil and reasonable, and get pretty defensive.
SNES gave us the music of DKC, ActRaiser, Super Mario World, Street Fighter 2, UN Squadron, Turtles In Time, and so many more. These are among the most memorable soundtracks in the entire history of gaming.
Haters can go suck some eggs.
Like this example, which labels reasoned criticism as "hate", and states that music from Capcom arcade games like SF2 or UN Squadron was "given to us by SNES".
The SPC700 was crazy far ahead of its time. It could even match the SEGA CD's PCM chip, a console that came out a full year after the SNES and at nearly double the price!
Or this, comparing the cost of the whole units of Sega CD and SNES as a way to validate its sound chip, as if having a Compact Disc drive in 1991 was a lesser factor to that cost difference!
I think nobody here is denying the SNES chip was a big technical advancement at its time, and some of the best videogame OSTs ever were delivered through it. It also made some kinds of music, like orchestrated or vocal music, feasible for the first time in consoles.
Just like the original Playstation was a big leap forward when it comes to graphics with the generalization of 3D, and gave us milestone creations like Metal Gear Solid games, that some people appreciate even today. But that pioneering nature came with some big limitations that nowadays are really clear, like lack of filtering, low poly counts or texture warping. And it's stupid to deny that many polished 2D games of the time or even before, like Metal Slug, Sonic 3 or Yoshi's Island, might look better and be much more pleasant to the eye of the current observer.
The truth is they're both really good at very different things.
For my reasoning above, I have to disagree with this. SNES soundchip was not actually "really good" at sample based music. It was a pioneer that made sample based music
possible, which was no small feat. But wasn't really good at it just as PSX wasn't really good at 3D graphics. Genesis (and other FM chips of the time) were really good indeed, but at a more limited set of possibilities.