Been using my gstar leopard and teebird for about a month now. Both discs are 171g
I've thrown pro leopards as my understable fairway driver for as long as I can remember, but these gstar leos may finally kick them out. The two plastics feel surprisingly similar, at least at room temperature. They are both gummy and sticky, with the gstar being a bit floppier. I was surprised at how fast the gstar leo broke in at first, but, unlike the pro plastic, it seems to have stopped degrading and is staying right in the perfect spot. The only thing I miss the slightly stiffer pro leo for is long rollers, though I don't throw many of those.
My gstar teebird is a little more stiff than the leopard, perhaps due to the bigger rim. I've thrown champ teebirds since I started playing DG and mostly picked this up for fun, but it has really surprised me. Like smitty said, it's relatively straight, with that great teebird fade at the end. Both discs are filling that slightly more understable slot quite nicely, and I'm sure they will only get better with age.