I have the FSA Wing Pro compact bar too. I did not know the the hood measurement was narrower, so I ordered a 38. It's actually alright for me, but I think I'd prefer the 40... always something to change, right? It's ok for now but I might get a larger bar down the road.

Other than that, it's a nice bar. The shape of the drops is very comfortable, and, although I don't use the tops very often, the wing shape is really, really nice.