I really believe that is all a preference thing. I would buy a ZDZ over a DA any day. I like the ZDZ better more power better throttle response and just down right reliable. I absolutely love my ZDZ 80. I had a 3W75 for a very short time. I personaly hated the 3W very hard to start, heavy and not near the power of a ZDZ.
The ZDZ was hard for me to start at first also. But once i figured out how they liked to be started i can crank my 80 on the first flip. It really all boils down to a ford chevy thing to be honest. A ZDZ is a hopped up chevy

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Chad