Hi!

im quite new to mining, and im just starting to tweak my rigs. Im currently using RX 580s, but i also have a 1070.
Should all my hardware mine the same coin or should each hardware independently mine the most profitable for it?
Because on whattomine.com for example if i put in one 580 and one 1070 it says to mine eth, but with just the 1070 it changes a lot but eth is never on the top.
So i thought: Means more hardware a faster ROI?