Metal Slug Anthology - Functional differences between PSP and PS2 versions?

[Shulamana]

Unfortunately I don't own a Wii, and have no plans to get one any time soon, the controllers just kill it for me.

Edit 1:

I've always had a hard time detecting micro-lag, so I'd say the PS2 version is the way to go.

Although I sometimes imagine lag where it doesn't exist, I don't think I really notice input lag unless it is truly atrocious. So I may still go with that then.

Edit 2:

Just to clarify, my issue is really the loading during a stage, as in that stupid character selection issue where every time you press left or right and choose a different character the loading screen pops up for a second or two.