I am going to bet the Pro is better,but how much? Already checked the Orion site and it had nothing.

wasp pro http://www2.towerhobbies.com/cgi-bin...?&I=LXLSU7&P=7

wasp http://www2.towerhobbies.com/cgi-bin...?&I=LXHGU1&P=7

I like the regular wasp because of the color of the block. And there is a nice price difference too.

Only thing I have seen is about the Pro in RC Driver when they dropped it in a MP777 conversion. They said it had alot of low end power and high end power too with a JP-2 pipe. Either way. $240 is a nice price. So is $160! lol