Nights and SRA both look utterly embarassingly shit and like neither development team has a fucking clue what they're doing.
Mario and Sonic on the other hand...well so far it's looking fairly decent, visually at least. The style is nice and it feels like there's some effort going into the presentation. Really can't say a lot yet though until we have any idea how it plays.
As a whole though, so far Sega's Nintendo showings are spectacularly shit/mediocre, wooh!
The first two screenshots did exactly what I hoped this game wouldn't do: Pit Mario and Sonic against each other in contests only one of them should win. There's just no fucking way Mario should be competing against Sonic in a race.