I have flown both and can say they are both great airplanes....

The SE will be easier to fly though- The fat airfoil makes overall speed lower, slow speed flying more controllable and does more aerobatics than the Chipmunk-

The Chipmunk flies like a pattern plane more than 3D- (which is fine) but will be noticeably faster than the SE...

What "75" do you have? Tower 75?

I hav a Sig SE and Irvine-53 which is perfect-

Do a search on these cuz there is a ton of great info. (especially on the SE)

Also, the 4*60 and Ultrastick fit the bill for 60 sized---