Not sure how my post would influence anyone to replace their DCup. I’m sure the TCup is equally as good, but in my opinion, nothing different enough to me to warrant an upgrade. There is however one feature that I could see some glass rig owners may value, you can twist the TCup to fit those odd angled glass fittings. All my glass rigs use regular angles, so not pertinent to me, but certainly an “update”, for those users.
Obviously, its pointless starting a "yes you would/no i wouldnt" thing, but at the risk of starting that, I think you'd likely notice the airflow increase, and therefore the dish temp differences (ducks for cover, but realises my shins are still an available target ).
The science is that the faster you draw air in a capped dish, the lower the pressure and boiling point of the dab, so therefore, lower temps needed = less drawing air off hot Ti = nicer hit but just as big a cloud.
The airflow of the TBucket is greatly increased, that in itself makes a big difference.
(I think, always happy to be wrong )