I have purple efests and Aw ones the Aw ones are slightly better but tbh there isn't much in it either are a good choice you can't do silly builds on either I keep mine above 0.8 and have had no issues at all still get a pretty good vape
There exists a 14a battery called Tensai 700 mah that I'm considering ordering just to see. Can't find them in the UK so would have to order from Europe. I'm pretty happy with my 800 mah AW IMRs at 12a though. I don't build super low btw.