I haven't had either above 10500 but up to that the late build AC was slightly better probably because it was newer. The RG is even better.
As I said earlier the newer POHs are nearer to the truth but don't believe everything they say.
Remember Cessna was taken to court over the published performance figures of the early C177.
DO.
Last edited by dont overfil; 3rd Nov 2010 at 10:49.