I normally use McTemporalDenoise and QTGMC Super Fast on interlaced VHS-to-DVD conversions to denoise and remove interlacing artifacts. Then I reinterlace after QTGMC.

Could someone please tell me what feature differences there are in plain English between QTGMC Medium, Fast, Faster, Very Fast & Super Fast. I've read the documentation but I'm not sure what noticeable difference there is. QTGMC Medium is obviously better than Super Fast but why?