I think its a combo that works well. I was not keen on the DT at first, it seemed very limited compared to the OT, but I've had a few days this last week to play and I've made awesome drum patterns with it, even simple 1 bar patterns can be easily tweaked into something interesting. I am more or less a new at music and have no knowledge, (although i have self taught ableton and used that for a couple of years) and always struggled to come up with decent drums, so i am mightily impressed with the speed and immediacy that you can get something going on the DT. Tried some baselines too last night and again found this great.
But for any long loops, ambient field recordings, vox loops etc, I still use the OT, so I reckon they work together really well - DT drums and possibly bass, OT everything else. Sampling into DT is super quick and easy, but somehow I still prefer to get stuff into the OT, as I love slice and random trigs the using scenes on longer samples