The SS seats are identical to the SSV, they have the same shape, bolstering and everything - just don't have leather as standard. I didn't want leather - had it before and found it way too slippy - not a fan - bring on the alcantara! Also, dual zone climate control in a ute? - seemed a bit naff to me and I really couldn't care less about the stereo, lcd screen or reversing cameras. So I saved myself the cash and went with the SS. The tail lights in the ute are all the same, so the only differences are interior, aside from the 19s - which weren't worth the extra to me. Given that I'll most likely be swapping the seats out for something with much heavier bolstering anyway, they were a moot point regardless of the leather.
If you want all the creature comforts that the SSV comes with as standard, then go for that - but if they don't phase you, then just grab an SS and spend the money you saved on productive modifications.