Last one is PCSX2 and I think it looks better than PC which I ran Natively on my RTX2070 in 1080p. PC version I think (I'm not digital foundry I can't measure) runs at a higher framerate. PS2 has Rumble and PSP well a smooth PSP version.
SDX is arguably the best version to play on a PC (maybe the best for all systems) - it runs perfectly on my system even at 4K, and I still have a 980 Ti. I think it has improved graphics compared to any other version except possibly Online Arcade, and it has all of the content from the arcade version of SP.