yes the metal gear and the plastic gear have the same torq but the plastic geared servos will be more prone to strip and flutter. I have seen hitec 605's strip out on a sig extra luckily a crash was avoided but they can strip under the right conditions. I have a pitts and went with the 5625's all the way around. It really depends on yor flying style. dut the pitts is a pretty decent size plane and I would at least use metal geared servos if not a servo for each aileron. Just my 2 cents. Good Luck and have fun.

Steve