What? 11x7 or 12x7? Wow.... I really disagree with those props. if you are just sport flying the 11x6 is fine but someone (Bubba [X(]) mentioned an 11x7 for speed? Maybe on a .60! Try 10x7 or 10x8 even 9x7 or 9x8 APC for speed---

You really need to tell us what airplane you fly and how you like to fly
A 12x7 is too big for any 46 sized engine IMHO-

Looks like Britbrat has it figured out pretty well---

APC is superior in performance- IMHO