Yep. The 140 RX is a more pattern specific engine, but doesn't have quite the punch the 160 has in my experience. On a 10 lb or less airplane, you'll have plenty of vertical on either one.

The 140 is more user friendly than the 160, because with the 160 you really need a pump or hopper or something to get adequate fuel delivery in every angle and attitude.

Of course the 140 is a few ounces lighter and rear exhaust too. It's more expensive as well [8D]

That being said, if it were me, I'd go with the 140 for the Icepoint, they don't seem to be 11 lb airplanes.

-Mike