Nothing turns out better than MPEG1/TMPGENC on my PC. That's strange...
(on low bitrate I mean, that is when I'm doing a KVCD. For KDVD I use MPEG2/CCE).

despicable ? What does it means ?

Okay ! So you are doing the same thing I do on KDVD. In this case CCE is as good as TMPGENC, I can confirm that (else I won't use it )

"despicable diferences in quality" means(in poor english):
cce encode kvcd mpeg2 and tmpgenc encode kvcd mpeg2 for 1,4Gb target, the differences in quality are irrelevants. if you can load only one of this files without identification(randomic), you don't know "who is who", they seems equals.

for kdvds is just the same quality, for more than you search, nothing is different!

for mpeg1 using the same cartoon, my old encode with avisynth 208 with temporalcleaner seems better than with avisynth 2.5x with "all filters" that i used in the tests...it's faster but not so good as the old! was "lucky" ?

Okay. As I said at the end of my previous post, I confim that

To tell you the truth, "a long time ago" I didn't find temporalsoften good at all and always used temporalcleaner.
But once I found a ghost effect in one of my encoding and I found it was temporalcleaner the reason. Then I changed for temporalsoften. But I confess that I didn't check if the wuality was different