[kolak]

Originally Posted by WorBry

The actual results obtained with that one 1080/30p HD-AVC.mp4 (8-bit 4:2:0) source clip (795 frames)

Bitrate of Cineform avi encode (Mb/s) - no audio

                   Native           VFW
Filmscan 2          327             326
Filmscan 1          239             239
High                169             168                  
Medium              133             133
Low                 122             122

Same frame count in all cases. I didn't record the actual file sizes (in bytes).

Edit: And just for reference, same source clip transcoded to Cineform.avi with DaVinci Resolve 14.1 (at Full 'Data' levels), which uses a different terminology for the quality levels, just to confuse matters:

Bitrate Mb/s

Best (= Film Scan 2)          332
High (= Film Scan 1)          242
Medium (= High)               172
Low (= Medium)                135
Least (= Low)                 124

Same frame count (795)

Resolve uses RGB pipe, so it will probably never be the same.
As I said- I don't think you should expect bit identical encodes (definitely not from Resolve).