Best selling HD console exclusives of the generation

[Farsala]

JimmyDanger said:
In a normal statistical sense - margin of statistical error being constant - higher selling games would have a higher number of overtracking/undertracking due to their higher overall numbers, therefore - with the statistical margin of error being constant - higher sales - higher number of sales under/overtracked.

Just so I understand how things work here though-

If a game is on PS3 = UNDERTRACKED, USUALLY MASSIVELY
If a game is on 360 = NOT UNDERTRACKED - POSSIBLY OVERTRACKED

I think that's how it goes - correct me if I'm wrong.

There is lots of evidence /speculation presented that some PS3 games are undertracked. A lot of them got bundled hard so I cannot see that they would magically stop selling personally. What evidence has been given that any of these 360 games are not undertracked?