Currently they are about the same for a 1070. ETH is more profitable if you dual mine.

https://www.coinwarz.com/calculators/zcash-mining-calculator/?h=470.00&p=180&pc=0.10&pf=3.00&d=3790500.49384329&r=10.00016000&er=0.13022103&btcer=2511.99900000&hc=0.00

https://www.coinwarz.com/calculators/ethereum-mining-calculator/?h=31&p=180&pc=0.10&pf=3&d=906185986949780&r=5.00000000&er=0.10925000&btcer=2511.99900000&hc=0.00