Final Fantasy 4 vs Phantasy Star Online Episode 3 - I need to listen to the rest of the PSO3 soundtrack to vote. Idola is great but beating FF4 will require breadth.
Final Fantasy Tactics vs Chrono Trigger - Exceptional match. Both are great. I guess I'll tiebreak for the one that's great in spite of having to work with SNES sounds.
Radiant Historia vs Dissidia 012 - EZ.
Dawn of Mana vs Wild ARMs 5 - I listened to the entire Dawn of Mana soundtrack for the first time in a long while, probably the second time ever. It's pretty good! Certainly not as good as Legend of Mana, and doesn't have some catchy tunes like SoM / SD3 had, but it's strong. Better than the two example pieces proffered, actually. WA5 is kind of a mixed bag. The two nominated themes are good, and the OP themes are catchy enough, and there's a few interesting ones... but it also feels like there are some misses, too. And there's weird cases like super's hyped Persophone theme, which I thought was very good on initial listen and now don't really like. So close match, but going with the more consistent soundtrack that still has some standouts. (Both of these lose to RH anyway.)
Legend of Zelda vs Contra - LoZ has what, 3 pieces of music? But 2 are super-iconic, and the other one is pretty good, and I'm not that impressed with Contra music.
Final Fantasy vs Castlevania 2 - <3 Bloody Tears.