Acrobatic Help
There is a big difference. The 50 is a 30 with a longer tail boom and longer blades. The 60 is a much larger heli, it is all metal where as the 30/50 is plastic. The 60 is going to auto better and fly a little more stable because of the larger size but the power to weight ratio is not as good as a 50. A 50 is meant to be a 3D power house and the 60 is meant to do 3D and normal flying. The 60 is bigger and cost more to fly and to crash than the 30/50. Nothing wrong with going to a 60 as your first machine but it does cost more. A crash kit for the 60 is about twice as much I belive. And it drinks MUCH more fuel than either the R30 or the R50.
A 30 to a 50 is the same as a 60 is to a 90.