
I've been using both for I guess a month now. I'm actually writing in Logic at the moment and haven't used DP as much only because I am not at the mastering stage of the songs I am working on.
For me, the things I can point out immediately that I like better in DP is the ease at which audio is edited in the TO. It's a lot more work to trim and adjust and cut apart different pieces of audio to me than it was in DP. In addition, Logic is VERY limited in it's simplistic MIDI recording setup. Trying to record from 2 different MIDI devices at the same time is both counter-intuitive and frustrating. Their whole environment, while extremely powerful, I feel *misses* the simplicity in efficiency that DP has. The role the focus of a track plays in the arrange window just slows me down a bit. In addition, the Solo functionality doesn't work as nicely to me.
Why do I even use Logic? MIDI timing is extremely accurate for me with external synths and I like regions better than what we have in DP. The whole Alias/Clone concept and coloring of the regions has made my MIDI content creation MUCH more intuitive for ME. In addition, the included soft synths are really A LOT better as a whole. Sculpture is amazing. Ultrabeat is amazing (love the pattern editor). Also, Automation editing is AWESOME when you can separate each automation curve out on a different line.
Why do I even use DP? For mixing/mastering it just feels better. The fact you can double click on a parameter to set it to 1, SO nice. The MasterWorks EQ is still a better EQ than the channel EQ in Logic. Audio editing is just superior. Automation CURVES are better. The options you have in DP are so much more powerful. While not as easy to look at as in L8, I usually only have fine tuning at the end anyways. Once MOTU addresses an issue I am having with DP and buses (which they are working on) then I will get back to my mixing/mastering.
And an interesting thought to ponder. I love how DP handles audio, and how certain MIDI functions are easier in DP. The thing is, I cannot imagine those being in Logic because Logic's strengths are in the fact it is different along those SAME exact lines. In other words, there are certain features that are mutually exclusive to each that would be VERY difficult to implement across both concepts without SERIOUS hacks and very complicated coding. A good example would be MIDI editing in DP. If you wanted colored region support in DP, then you'd have to have a concept of regions that were probably NOT automatic. Then, when you were copying and pasting in the sequence window, handling new regions and their creation/destruction would REALLY get complicated in DP. The whole beauty for some people (not me) is that it is one continuous MIDI track that is VERY EASY to manipulate or see in time. I know people who absolutely love this fact and do not like Logic because of the way it handles MIDI.
This is why I like the fact I know different DAWs based on DIFFERENT concepts of use. It allows you to select the right tool for the job on what YOU need or prefer. And, not being locked into one DAW means if one of them has an issue you cannot work around, your work around is to do that particular task/project in a different DAW and continue working.