So I finally got the Thrustmaster T-GT, after half a year of using the G29 (mostly on GTSport), and OMG, are there some very, VERY big differences.
The main difference, and the biggest, most crucial one is the FFB. Jumping over the technical data (better belt driven mechanism, a sub-woofer speaker in the back that transmits a lot of vibration and detail in the wheel column - works only on GTS - , etc), there is a NIGHT AND DAY difference, because basically, if you're using a G29 on GTS (regardless of FFB settings, i've tried all combinations) you SOMETIMES feel some curbs, once a day feel some bumps (barely), and get a slight ease of centering power when you lose your traction (but generally you get that feedback too late). With the T-GT, you feel everything, instantly, all the time. I'm talking car engine vibration, constant varying road surface detail, wheel flex and wheel traction, you're able to tell way sooner when the wheels are about to lose traction, you also get a generous wheel vibration when you're understeering, and so on.
Basically, if you're a G29 user, as far as FFB goes, you feel next to nothing in GTS (which is really a shame because in Assetto Corsa, PCars 2, F1 2017 you feel a lot, lot more detail and variation with that wheel). With the T-GT, you feel everything in a much more smooth and realistic way. IT is really fantastic and transformed GTSport for me from a great game with horrible lifeless feel, to a game that feels better than Assetto or PCars 2 with this wheel.
Another important difference is the break pedal and the way it works with GTS when using ABS off. In case you ever tried (with the G29), if you turn the ABS off, it's crazy tricky not to lock up the wheels instantly, to the point where it's almost useless (again, in AC and PC2, driving without ABS feels fine and it's realistically difficult to lock up the wheels, you've got to press hard and fast). Here, with the progressive pedal adjuster thingy (I adjusted mine by basically raising the rubber triangle at 1 cm), it's perfect - I can finally play GTS realistically (use cars like the old Ferraris and Cobra, etc without ABS and not die instantly, as well as, crucially "group 2" cars - SUPER GT500 - without ABS, as the cars in real life have no ABS and TC).
These 2 differences have transformed GTS for me, and made it worth every penny. It's also worth mentioning that the wheel feels better, has more useful buttons, and, crucially, is a bit bigger which makes for a more enjoyable experience in any game.
Hope my insights helped!
. The G29 was never the officially licensed wheel for any GT game. The last officially licensed Logitech wheel for GT games was the DFGT for GT5 Prologue and GT5.
