Overall better than Toreador's in my personal opinion.
The Dark resist-25 isn't that big of an issue since you wont really resist stuff like Sleepga much anyway. And as for the Def-12, I dont think it will matter much to damage taken to the DD that use them. Not to mention they are lv40 over 57 (lv capped area advantage) and give a Ranged acc+7, which I'm sure THFs appreciate.
Some people do complain about the price relatively to the NQ or Woodsman, but this one of those last pieces you want to complete your gear set with. Best AH buyable acc ring on AH in my opinion. That and the white border just makes it look more special than Toreador's. 8)
There is no reason to spend 6+ mil gil leveling any job from 1-99. It takes a day or 2 if lazy. Why would anyone waste gil on these this day in age is beyond me. Use whatever you have r/ex in your MH or on a mule and get 99 in a couple hours. Then if you use anything that isn't ilvl gear you are failing.
Any 75 monk worth their salt is already going to have Counterstance up in most situations, meaning the -12 defense isn't hardly going to make a difference on anything. It won't make a difference without it up either, so what's the issue?
Get whichever one is cheaper, and if you can use the r.acc too, this is likely your better choice if you don't want to use additional R.Acc rings.