The others have made good points. For differences my 60 size planes all seem to fly smoother, and a little more predictable. The winds can suddenly come up pretty hefty at our field and the larger plane aren't bothered that much. If you are coming in to land with an 8.5 lb with the engine at idle the plane is not going to suddenly stop flying because a wind gust hits it. It may slow down, but its still going to keep coming! The larger size is much easier to see and when coming in for a landing the larger wings and fuse really adds to the "cool factor" I tend to fly my larger planes more than the smaller ones because of this.