I was going to start my own thread on my point of view but i see no point seeing there is already a few.
Now we must keep in mind that ME2PS3 is running the ME3 engine..And the fact that it's just a demo so far.
The demo starts off with a background story cutscene on what happened in ME1. I noticed some framerate drops during the scenes and some poor textures on people/aliens/ and space environments, including the ships. But honestly i couldn't tell if it was meant to be like that to give it the "flashback" feeling to it.
The gameplay was smooth. No problems there. In-game graphics were great although at times i did notice some poor textures, but only twice i noticed it(rare).
As for the screen comparisons, i think the lighting is better on ps3 as well as the colors but nothing SIGNIFICANTLY better on ps3.
My conclusion is ME2 is slightly better on ps3;.. and i expect ME3 to run equal to or slightly better on both HD concoles than ME2PS3.
And to bring back a past topic, Uncharted 2 is overall better visually. :)
e=mc^2

Gaming on: PS4 Pro, Switch, SNES Mini, Wii U, PC (i5-7400, GTX 1060)