Which do you think will sell better and why? It might seem obvious but things have changed since GT prologue and Forza 2 released in that the 360 has been beating PS3 in total sales. There is a much larger install base to buy Forza 2 than GT5 however market saturation comes into play.

GT5 is going to release December 09 or March 2010 (long story short an insider who has not been wrong yet posted a riddle) and Forza 3 is going to be an 09 release according to that leaked video. The Forza franchise has become stronger but the same cannot be said about GT because the last damn flagship game released 4 years ago.

What Forza 3 has going for it:

- Releasing on a larger install base

- Releases near huge 360 titles so should help increase sales

What GT5 has going for it:

- It's a GT game

My guess is that GT5 will do in a year what Forza 3 will do in a lifetime in terms of sales.

I think GT5 will sell more even with the 360's larger install base I think GT has that much selling power.

GT5 will sell more but Forza 3 is a day 1 buy for me and all 360 owners that call themselves racing fans But both games will be amazing

GT5 easily will sell more. No questions asked.

Tie, because playstation fans are way more into racing games than 360 owners

Isn't it pretty obvious that GT5 is goina outsell Forza 3...there's really no debating that.
It wouldn't matter if Forza 3 is a 100 times better than GT5, GT5 would still destroy Forza 3 in sales

Gran Turismo will destroy Forza in sales and quality.

GT5 cause its GT and there known as the better racing game. *runs from starcraft*

GT5 will easily destroy Forza3 sales wise..

GT5 should comfortably outsell Forza. Although both games are shaping up nicely.