😉 If you don't plan to o/c the only real diff is heat, Polly are VERY hot around XP2000+ speeds while Tbreds are way cooler (even at XP2600+). There are 2 types of Tbred, A which only uses 1 extra layer, is often mult locked and don't o/c much better than Polly and B which uses 2 extra layers, is always mult unlocked (but watch out for dumb mobos) and o/c's like a dream even the XP1700+ version.