Ugh no, most PS2 ports on the 3ds are either dumped down or have framerate issues and the best looking games on the 3DS lack a huge amount of AA allowing you to count pixels while playing.
Titles that do show GC quality are MH4 and SSB4 both of which use up more ram than is dedicated for games on O3DS. the N3DS is more of a portable Gamecube than anything but we won't know that for sure because no one will be crazy enough to make their game N3DS exclusive. Thanks Nintendo.