Here's how I view it:
Track Selection: GT>>Forza
Car Selection: GT>>Forza (GT has a lot of junk but now they have every manufacturer I care about)
Game Progression: Forza>>GT (GT is far too repetitive IMO, Forza is much more balanced)
Graphics: GT>Forza (amazing stuff from GT)
Customization: Forza>GT (Paint, rims, everything can be tweaked in Forza, though GT basically matches it in performance mod options)
Online: ???
We'll see how well put together GT5's online system will be. It has some tough competition in Forza.
*edit: Just found a car list and apparently GT5 will have Lambos and Porsches. Yee-ha! That definitely puts the car advantage in GT's favor.

Or check out my new webcomic: http://selfcentent.com/







