Engine comparison

OK–so I’ll take a clue and quit pressing for a point-by-point comparative assessment.
So, in regards your transcoding process, would you say CloneDVD is more like what D2O describes as Constant or Variable:
If Variable, do you feel the ‘intelligence’ incorporated weights high-bitrate v. low in any different a fashion?
I guess I’m looking for a guideline as to CDvd’s strong-suit for movie-only–be it short/long movie, high/low bitrate, action or ‘sedate’. What kind of movie ‘shows off’ CDvd’s engine best? [Performing multiple test-runs of a large sampling of movies can be both time-consuming and inaccurate if the wrong movie/encoding(s) are selected]