I haven't done any indepth testing as I don't have a way to accurately record off PSVita, but there is a noticable (0.5-2 second, if I had to put a number to it) difference in most full loads of areas of the school in Any% for DR1 & 2, a smaller but more consistent difference (~1 second) in major transitions between scenes in Class Trials, and some slight input lag on the Vita version (can't speak to the performance of DR1/2 Reload on PS4 or any version of UDG). I don't think by any means it's impossible for a console runner to achieve top 3 times or even a WR in any category of the game, but they would be at significant enough a disadvantage that they would need an almost perfect run to, for example, beat Smiley's DR1 Class Trials% record.
E: Also, going by my experience with DR2 and UDG casually, running off a cartridge or disc on consoles has enough impact on these load times to the point a digital download would be mandatory to be competitive, IMO. UDG's loadtimes off a cartridge are pretty mediocre.
Would be interested to know why Danganronpa got cut - I assume it's because I only submitted a run with no commentary, which I can understand. If it's just too VN-ish that's fair too.
I usually have discord open for other stuff while not at work, so sure :)