The BME44 is the only one of that bunch I have seen and run and compared -
They all ran great-
The prop sizes they used were smaller -to obtain best performance.

I do NOT like side carbs -they are clunky -to me-and inconvenient to fit in cowls.
If the good old side port was such a bang up idea - then all of the glow stuff would still be a side port.which they were 50 years ago- excuse me 60 years ago.
The piston cylinders on most quality industrial engines enjoy one great advantage - they are the product of a ton of feedback on what worksbestfor the industrial application.
As a nice model engine - this is a great help.
As far as the crank setup - well - The cantilever has it beat all to hell for ease of rebuilding -and all of the ones I have seen run very smooth.
Power ? I have YET to see any 2.4 equal the ZDZ setup -or even come close.