[BLKPHN]

First up nice choice of cars, The GT-P is a great tourer and sounds amazing. The XR6-T is great bang for buck.

However the FG XR6-T is much quicker in stock form than the GT. But the GT is a "GT" and the extra options like Brembo's and the like are nice. I would be going the GT if its not the daily and be getting the MkII with the 6 speed manual. The XR6-T is fast and the FG suspension is certainly better over the BA-BF set up.

Neither one is better per say, they both have there pro's and con's.
GT- Pro's...Prestige of having a GT-P, the brembo brakes, Interior with the bigger bolstered seats, it may hold its value better..........and the Sound!!!

GT- Con's... The fuel usage is quite bad, older interior/gagets (not really a bad thing), heavy feeling front end, parts will be more $$ brakes, tires etc.

FG XR6T-Pro's... Fast car in stock form, better on fuel, suspension is better than BA/BF, updated interior, updated Gearbox/Diff set up, overall a better set up car.

FG XR6T-Con's....same look as every other falcon, poor resale, doesn't have that "I own a GT feeling", doesn't have the same options as the GT.

Its all really dependent on your needs. In my opinion i'd Buy the GT and have a nice weekender but keep the daily.