The other thing I don't like about ZEC is that the difficulty fluctuates +-15% day-to day, while eth (and even exp) is more steady.
Looking at the ZEC difficulty chart it seems the difficulty hasn't changed since Christmas.
The EXP difficulty is more volatile since whenever there is a pump it jumps quickly.
difficulty is currently 878,000. Earlier today it was over 1 million, and in the last week I've seen it as high as 1.3 million.