Originally Posted by
mattcalifornia
My understanding is that Chorus, Record and Super Record are mechanically identical (except that you have more gearing choices with Chorus). I believe the only difference is that Record and SR use more carbon and Ti to achieve lower weights. So, unless I'm mistaken, Super Record shouldn't shift any better than Chorus. It's just lighter. Somebody please correct me if that's not right.
How they function is identical, ie. the lever swing and how many gears it moves through. I don't know if differences in material or tweaking in assembly make a difference. I would assume that the cost difference to super has to be something more than just a few grams difference.