Hi Geting, yes I would think they are broadly equivalent in terms of level, though I’m no expert on the DT. They are blogged on Big Dave’s site and have a strong following.
You may have seen Whetstone’s thread “Times Cryptics… PREVIOUS PUZZLES”. In fact he moved on from the Times to the Telegraph a while ago so all the recent posts relate to Telegraph clues, though it’s hard to see any difference.