jagnweiner,
I may be wrong, but I believe your GP big stick actually has a semisymmetrical airfoil. I have the GP big stick .60, and it as a semi airfoil, so I'm pretty sure the 40 does as well. Small point really, but it does make a difference in flying characteristics.

Anyway, expect the stick to land much like the trainer--that is, it will float quite a ways. Of course, I'm talking from the experience of a 60 sized big stick with a saito 100 pulling it--it doesn't like to get on the ground! It will take off very quickly, and is very aerobatic. Wherever you point it, it will continue to go that direction until you give it another command. This will take a little getting used to. You need to really begin mastering rudder control on landing, as this plane will weather vane on you in a hurry! And, I promise you, if you point it at the ground, and expect it to level itself back out (as you say your trainer will), then you'll need a trashbag to take it home in. You have to fly this airplane, it will only do what you tell it to.

BTW expect your Vstick to be of fairly poor quality wood. Be careful when handeling it, or you'll put your thumb right through the wing sheeting. Good luck. It's a good flying bird, but as built, won't take much abuse at all. Is yours the 40 or 60 size?