I can't recall ever flying the Sterling but I have flown the BUSA, outstanding!! I had my own scratch built D-VIIs and then there was a small ARF sold by Hobby People I think. Maybe a World Models? Mine and the ARF flew about the same, very nice planes and unlike the other WW1 Bipes that had round motors the D-VII had pretty good ground handling and doesn't flip over on landing. Of the WW1 Bipes I have flown I rate the Fokker and SE-5A the best of the bunch.