At the risk of being flamed, here's my honest opinion.

I run both a DA50R and ZDZ60. The ZdZ is a bit more difficult on the initial start each day, but once warm starts first flip. The DA Starts better from cold, but then once warm will start first or second flip.

Of the two engines the DA was the only one to deadstick once during breakin!!, but was probably down to me not having the needles set right (out of the box settings)

Both are good engines, i would not say one was better than the other..........