This struck me as a bit odd too.
I'm more surprised that Lamborghini isn't OK with a splitting bonnet/logo (depending on which it really is), but is fine with an unpainted lambo logo.
Just dug mine out of the box the other day and it sure looks impressive. Haven't had a crack at Transforming him yet, as I think I will need to set aside a substantial amount of time to do so.
While I do like the looks of both modes, I also like the figure to be quick(ish) to Transform. Something tells me Sunstreaker won't be in that basket.