Theres some vid footage i saw earlier of some dude live streaming from EVO and he was showing the Switch 2 version of MK Trilogy for a few minutes. Based on the character select screen, the one theyre showing is the PSOne version. They could still have the N64 one in the Kollection too possibly.
Load times were near instant, and it looked really good. Looking forward to seeing more detailed impressions of the games.
N64 is the version used for the competive scene although I suppose if they fix the bugs and let you turn off aggressor than people might prefer the PS one.