i'm pretty sure the ipt balls use the super pro formulation and not the new duramith forumlation in the tournaments.
Having played IPT ball set for well over a year on a regular basis, they play great AND just like the Tournament Cue ball, do NOT leave chalk marks on the cue ball. That is the main reason I think the IPT balls ARE the same formula as the Tournament balls. I.M.O.
gottem both, i love my centenials, but I give the nod to the tournements. Ya can't go wrong.