Currently ETH is more profitable than ZEC.

I have a 3GB 1060 with crappy memory that only gets 18.5MH/s so the same card can do 300Sols/s on ZEC with GPU clock and power tweaking. So in that case ZEC is better.

Generally with other 1060's ETH is more profitable if you get 23/24MH/s.

ETH price is really doing well now, with Metropolis coming soon the price is expected to rise even more, so i would stick to ETH for now if i was you.
Metropolis is going to address the difficulty bomb, so difficulty will be predicated again to Network hashrate and block reward will reduce slightly.
So Ice age is being pushed back and mining for ETH should be good for some time to come.