Disagreed. Everyone has their own opinion, but the Driving Force GT is just not as good as the G25. Sure, the wheel might be a bit thicker, but there's no manual gearbox, no paddle shifters, no clutch pedal and no leather and stainless steel (Which doesn't matter too much, but it's still a nice addition). It costs more because of all these extra features, and while you may call them useless, wheels are to make games more realistic, and these features do contribute to realism (With the exception of the last one). In my opinion, the manual gearbox is more fun than the paddle shifters or sequential, so I would get less fun with the Driving Force GT. The time it actually "wastes" isn't that much time, and you can still outrun a sequential car in a manual car if you have the proper skills (I'm presuming both cars have the same performance for this situation). As for the G25 shifter feeling cheap, I used to get that problem, and eventually the shifter broke, but Logitech sent me a new wheel, and the shifter feels great. I also like the design of the G25 more than the GT, but that's just my opinion.
That's all I have to say.