Edit: Saw the post further down. I find my Dnc to be more evasive than thief personally, they get a potent native Evasion bonus too, and a lot of their standard gear has evasion on it, where thief tends to stray from Evasion in lieu of more attack rate. Iirc the last time I did the numbers I think my thief only had something like 15 more evasion than my Dnc.
THF has 20 more skill and 25 more straight eva over DNC not including merits/CP etc. I don't know about you, but when I solo an NM on DNC then solo it on THF I just notice a huge difference in evade rate.

As far as damage goes, well all things considered DNC really can pump out some good numbers. With the right buffs I can ride my presto/step/RF timers and throw out a solo darkness SC every 30 secs or so. But at the same time would an optimal DNC be able to outparse say a pimped out mandau or twashtar THF? I honestly couldn't say.

But at the same time, it's absurd to think about such things lol...aside from a few tweaks here and there I'm pretty happy with both jobs.