Billet wheels don't necessarily make masses more power, you will notice a lot better spool tho due to the weight.
Ive driven an EP both on a standard scoob TD05-16G, TD05-18G, aswell as the Greddy variants of them both. The Greddy/Trust units felt massively different and a lot more 'urgent' They run a different turbine wheel design, and the rear housing were quite different too.
In all honestly i would put a nice GT2860RS or something similar on and leave all the TD/VF stuff behind.