Wait, wait, wait... have I just read someone say Forza feels similar to GTA5?
Unfortunately you did. Given that GTA V and Forza 5 are two very different games, I find it ridiculous that one would be trying to compare the two.
Sting, Forza 5 is as close as consoles can get to a proper racing simulator (and for those who prefer personal computers, if you com here and say "PC master race", my Father will use his Holy Spirit to give you cancer). Racing is what the game is based around. Racing and driving in general in GTA V is only a part of the actual game. Granted, it is a reasonably important part of the game, but so is the shooting. And we do not have people coming here to compare GTA V to any of the abominations that resulted after Call of Duty: Modern Warfare.