Which Avid HD Codec is recommended?

[Giulio Tami]

Hello there.

This is Giulio from italy, sitting in front of Avid MC 3.0.5 (no AMA).
Importing a native h264 CanonMarkII file.
Importing it both in 1:1 and/or 1:1x codec.
Importing it both in RGB and/or RGB “dither colors”.
Immediately re-exporting the file from source into either 1:1 or 1:1x or uncompressed or no-compression(none) mov files.

The result should be absolutely NO difference between this export and the original file, right?
lossles in.
lossless out.
Truth is that the exported file has noticeable differences:
1) output file color is poorer… meaning the output file is desaturated. Specially on reds.
2) the output is slightly darker maybe 4/5% than the original, let’s say…
3) I can definitely see compression

Should we consider I did something wrong which is possible even if I’ve been an avid editor for 10 years, now…

Or should we finally state once and forever that avid 1:1
IS NOT LOSSLES AT ALL?

Another consideration:
Canon MarkII files run around 45 mb/s.
Importing them into a dnxhd 120 codec should give them range enough (dnxhd120 is 120 mb/s which is almost 3 times what needed to deal the native canon bitrate…)
But once exported into an uncompressed file… the result is soooo damn shitty compaired to the original.

Please someone help me !!!