I've been using both of them for about a week now, and they are both solid performers. Really, the only big differences are the switches and the adjustable 510 connections. I prefer the 510 on the ELA, but quite honestly, once they are set, the adjustment becomes irrelevant unless switching atomizers.
I was a little concerned about the button on the ELA, but on the V2 it sits flush with the bottom, unlike on the V1. The locking feature works nicely, but I don't use it unless I am going to tuck it into a pocket.
The buttons I'd call a tie. Although the design is different, they both have a nice, light, smooth
throw, and I haven't had a single misfire.
I've run both down to 0.3 ohms (pretty much the bottom end of my comfort zone, until I get some 3 mg
e-liquid, lol) and neither mech heats up unexpectedly.
I think both of these are a good purchase (especially the Workhorse at its price point).