https://fr.wikipedia.org/wiki/Sp%C3%A9cial:ContentTranslation?useskin=timeless
Top user links (my page, my talk page, ...) are not correctly shown, like without styles. I suppose that some CSS are not loaded.
Currently it's hard to use CX with Timeless enabled.
(High priority in terms of Timeless. It's a blocker if Timeless is to be ever made default. Not high priority in terms of Content Translation development plan.)
I can't see any major difference (only small differences in padding and sizes) between Timeless and Vector currently.