None is available yet.
Request have been made already about the various prop versions (vs piston)
Not sure the 340 -> 440 was a conversion.
So, for what's currently available in the game early on, the Martin is still a tad better (just a tad). Then the Beast. The Viscount (ok, I say that because I'm still flying 350+ frames in 1991

). And the F.27, obviously. But less range and no C seat capability.