i like the grip of the DX teebird and once you beat it in, it will have more glide and fly further than any other plastic. a champ or star one will be more stable with less glide (and fly shorter) for quite awhile until they beat in a bit.
try cycling DX teebirds. you've got a seasoned one now and a new DX will have more stability. eventually the first one will beat into a turnover disc, the newer one will be a beat in straight flyer and then add another new one for hyzer drives.
Several people keep multiples of the same disc in their bag at various stages of wear and or different plastics, as those factors can significantly affect flight and/or heavily influence disc selection for a given shot. One for straight and one for flippy turnover shots, maybe even rollers, or one for lots of fade and the other for straight or even turnover shots.
Star is good stuff, but if you're looking for a disc to stay at a given level of "beat-in-ed-ness"
nothing beats Champ or Z plastic. Like Noill said... takes longer to get get to the desired level, but stays there the longest.
Translates into more consistent performance because they evolve slower. Barring major scars or gashes, clear plastics like Elite-Z and Champ don't change much from round to round, even if you whack the heck out of a tree. Star is definitely tougher than DX, but I've had them change pretty significantly after a
really bad impact.
Not so with Champ/Z.
Many experienced players (myself included) elect to go with low end plastic on putters. Personally I like the softer feel and think it results in less spit outs when you hit chains/basket, and typically have less roll, skip, or bounce on putts and upshots because they absorb more energy on impact than harder plastics, and tend to have a bit grippier surface. But again that;s really a personal preference. If something works for you or you like the the feel of something, then that's probably the right choice,
especially when it comes to putting.