Sorry Joe,
I couldn't help myself with that throw away comment...
Seriously, the lighter the better the model will perform. A good example of this statement can be seen and experienced with indoor foamies. The lighter model always flies better.
I used to fly a Pinnacle with a 140RX. It struggled in the verticals so I sent it to weight watchers. Managed to pull 250 grams out of it pretty easily. It made a massive difference to the vertical performance. I could actually make a radius on the top rather than flop over the top.. lol
Power to weight usually rules...
Cheers,
Jason.