Haven't tried the others on your list, but I can say tat the Mutation X v4 is pretty awesome. Nice build deck, airflow like my Plume Veil when the sides are opened, but better flavor possible by just using the bottom air flow and closing the sides. Can close the bottom as well, and adjust basically to suit your draw, flavor and cloud needs.
That said, I got spoiled with my Vulcan and it's juice well. Dripping in to the Mutation, and my Freakshow with similar bottom air flow, means placing it correctly and not over dripping else it runs out those bottom holes on on to my hand. You can close one of the sides easily, if you want to go single coil and focus things a bit, but there's now good way to close just one of the bottom airflow openings. Still, it's got me pretty happy over all, and I'm good on new drippers for the time being, until something significantly better comes out. Which will likely be in a week, plus or minus 6 days
