The only tpu 85a I’ve used is sirayatechs, and was a good experience [on an A1 and elegoo centauri carbon 1]
One very notable thing about sirayatech’s tpu is that it is straight-walled on the spool, and so without the intrinsic kinks and bends, it doesn’t initially TRY to kink or bend in areas where you really don’t want it to [directly past the extruder gear]
Tough to show on camera, but, black is siraya85a:
notice how there are no kinks and bends and stretches on the filament itself. It can even tolerate short runs of PTFE although I recommend none. It’s simply made better and it matters [imo]