I don't know what you mean by skill set being different exactly.

When cutting streamers, going a little faster can be an advantage, but it can also be a disadvantage. The rules do keep things balanced. For example, in Open B class, you can have up to a .30 size engine, and your plane can weigh up to 3.5lbs. Your exhaust has to be 8" or shorter, so no full length tuned pipes.

So, you can put on a high pitch prop, and go really fast if you want. But, if you do that, you find that you can't turn very tight at all. If you are fast, but can't turn, you constantly overshoot guys you are trying to catch. And then they just tuck in right behing you as you go roaring by, and you loose your streamer and never get anywhere near their streamer.

Most guys instead opt to go with a low pitch prop, and wind the engine up to a fairly high RPM. The result is a lot of pull through turns. That, plus a LOT of wing area, makes for a plane that can turn or loop very tight, and hold that tight turn pretty much forever. The most common prop is the MAS 9x4, and it's usually turning 18-20krpm.