No, FFI and II PSP have identical gameplay to the GBA releases, meaning they are the easiest out there. I'm pretty sure FFII got further refined, which makes it actually better to play, since that stat system needed many improvements. But then again, the PSP version of FFII gives you only one blood sword, so it kinda evens out.

In any case, i like the PSP version. I would've preferred sprites more faithful to the original (they should have gotten Kazuko Shibuya on board, but they;re still better than the FFIV sprites), but I think the game overall looks really good with some great sound quality. Hope you have fun with it! This is actually the version I went with during my marathon.