OOTP8 is virtually the same game as OOTP'07. I don't see much point in upgrading, myself.
As for OOTP9... who knows right now. There are almost always incremental improvements with each full game that is released, plus some other minor stuff in the patches.
Edit - The newsletter had this to say:
Quote:
|
Several improvements have been made to the handling of historical leagues, for example the addition of several new stats modifiers, solidifying OOTP's place as the most flexible, most realistic historical baseball simulator.
|