Sure they should. They are exclusive racers launching around the same time on competing platforms. It doesn't matter if they are different kinds of racers with different priorities, it's natural to compare them. The problem is fantroll hyperbole and crap flinging, not that the two will be compared.
http://i.imgur.com/GJYBL1e.jpg ^ NeoGAF mod and Microsoft "shill" perma-banner bishoptl, wearing a spiffing new hat from his sponsors at Sony
A car fan wants both but they each have flaws. They're comparable because they're both car games still, how's the AI, online racing and so on. Personally for AI forza 5 changed my opinion on other racers, it's a step ahead because it's way more diverse now. Either way after viewing The Crew on Beta PC I'm more interested in that game until I see more of the other 2.
Xbox one, PS3, Wii Play for the games not the evil corporation, they're all evil in the end.