A good question would be this:
How many XBox owners actually exist to buy a Xbox360?
How many PS2 OWNERS (Meaning, subtract double buys, replacements, etc) to buy a PS3?
How many XBox/PS2 owners will actually buy an XBox360/PS3??? More? Less? 24 million XBox's? In about a year we will hit the XBox1-2 threshold.
Numbers: Checker Players > Halo Players
Checkers Age and replayability > Halo Age and replayability
Therefore, Checkers > Halo
So, Checkers is a better game than Halo.