Hi Oscar,
The flared front and rear guards and the indicators on the front guards they arn't flat into the body (like gtst) they stick out and are smaller on a gtr. The GTR rear wing, Interior is different seats, dash, other guages etc. The fins on the back of the diff indicate that its a V-spec (Victory spec) GTR other wise if it doesnt have fins its a standard GTR.
Other features in the V-sepc version include: Slight modification to stock suspension -being lowered more. The reaction time of the 4WD ATTESA system when under acceleration. and a couple other features.
Read this for info on what too look out for
http://www.skylinesaustralia.com/forums/sh...ead.php?t=35129
Hope that helps,