^Ignore this wise-ass
Here you go
In all seriousness it seems that the rears are the same caliper. I know that LGT's are supposed to have better brakes but have not personally looked into it. Looking online and finding that the same rear caliper is sold for 2.5i, 2.5GT, and the 3.0 I am led to believe that the difference is probably in the front calipers.
Like I said though, I have not looked into it enough to provide factual feedback. Just going off a quick search via a parts retailer.