The best prop in my opinion for any given plane is one that will fly it the way that you like. The 10 x 6 might not be quite right, then again you might not like the 11 x 6 either, but it should fly fine with the 10 x 6 until you try the other.

Try a number of different props. Even different props of the same size by the same manufacturer will not always fly the plane the same way. Give a few different ones a go as you have the ability and decide what works best for you. That's what is important, but more so, have fun doing it!