I doubt anyone on here would claim Castlevania 4 to be better than Rondo.
As much hate as it seems to get though, CV4 does a bunch of things really right! I thought the soundtrack was really good for a snes game and I liked the look of it. Yeah, it doesn't have CD audio but it still sounds good. That being said, gameplay wise it feels the least like Castlevania of all the games in the series before Symphony of the Night. The 8 way whip makes traversing the world incredibly easy when compared to the NES games. It almost doesn't matter what subweapon you have when you can just attack at odd angles.