When you say more pull what do you mean?

Do you want the hover kind of pull or do you want it to pull it through stunts with more authority?

I have an Ultra Sport 60 with a G-90 and I like the 12x8 the best.
Not real fast but plenty of pull.
13x8 was kind of lifeless. 6 pitch props are pretty slow. But pull well.

I've wanted to try a 12x9.
It should work out pretty well, but won't know until I try.

I don't have clearance to run a 14" prop on this plane.