I can't give you a comparison side by side, but I have had a 4*60 with an OS91 surpass engine on it for over a year now and I really like it. Not sure if you are planning to build from kit or assemble the ARF, but there are several modifications that you will want to consider if you choose the 4*60. However, they are small mods and have not changed my opinion on the flying characteristics. It is a great plane.