FPV GT-R spec vs HSV GTS

[flooded one]

just wondering what do you think of this. I have a mate that's an absolute HSV nut. we were discussing HSV and FPVs the other day and he tells me the reason why you don't see a HSV GTS vs FPV GT-R spec comparison is because the GTS would flog it. I have too laugh .no disrespect to the HSV GTS. its is quick. but I haven't seen a stock GTS record 4.5 sec in a 0-100km/h time yet. his argument is you cant compare a GT-R spec to a GTS because the ford fans will think that's unfair. I have no idea what he means by it. anyone here reckon they know or know how a GTS would go against a GT-R spec?? in terms of performance of course not in what car has more gizmos etc.