Well, it'll never be apples to apples. Because of the different technics, there will always be some flavour of peas and bananas.
For reviewing, a 15sec sample ...
Code:
x264 --crf 18 --tune filme
CUDA-bob, direct: 8530 kb/s +86%
CUDA-bob + MDegrain2: 6422 kb/s +40%
TGMC: 4585 kb/s [ref]
All three samples:
clickme (MediaFire, ~35 MB)
- Plain CUDA bob is not good at deinterlacing, forces very big bitrate, but at least it is fast.
- CUDA with MDegrain2 is same bad at deinterlacing, still requires much bitrate, and it is not fast anymore.
- TGMC is TGMC.
All in all, this is too much noise about something very simple: HW deinterlacing can be an option for live viewing, but for encoding it is not a good choice. (Well okay, maybe for "burst encodings" ... in any case it's beyond me how someone with functionable eyes could rate this as "good quality" ...)