10.5 blinky vs 13.5 AT

[West Ridge Racing]

Hi!
New to 12th scale racing and I am loving it. Been racing Tc and offroad for years and always thought 1/12th looked boring until I tried one. I am hooked now.
There is talk about going 10.5 blinky instead of 13.5 advanced timing here in Sweden and I think it is a good idea.
Is there a speed difference or is it pretty much the same topend speed and acceleration?
So I want to get a head start buy asking what the most popular esc/motor combo are and what rollout works so I can pass that information on to my friends he he.

Alex