My Vega 56 does 47 MH/s on eth...thats a little over 50 bucks a month. Even at 2200 on cryptonight it does not come close to that, so not sure why people would mine that over eth.

Two 570's still does more in eth and costs less than a single vega. The only argument for Vega at this point is its slightly better Perf/watt, since even two rigs of 570s will cost less and produce more than a rig of vegas.