The PSP version is windowed rather than being expanded to take advantage of the wider screen. It's also, to my knowledge anyway, functionally and aesthetically no different from the Saturn version. On top of this, the Saturn version is probably more accessible thanks to the relatively advanced state of Saturn emulation, and is in my opinion preferable simply by virtue of not being on a handheld.
If someone wants to use my translation for a PSP version, that would be fine, but I'm much more enthusiastic about getting the Saturn version done.