more detail =/= better, more detail could mean more things to look wrong. Like the pipes and lack of shadow in the internal parts really killed that pic for me. Sometimes less poly but a well done normal map and specular map could yield better result.
And I didn't say it looks like Forza as a compliment, I say it as a critique, That pic has one thing like forza, which is the unnaturalness of it. A lot of detail, quite accurate model but it doesn't look real, even older GT series or the one on PSP has always been able to look very real from a distance even if there isn't a lot of detail in the closeup, and should always look better than Forza, however in this one pic it fails.
I do have to disagree with the last part, Forza does looks better in action than in screenshots.