1.6 ohm dual coil at 3.7v:
Massive dense vapor production.
Massive TH.
Above par flavor.
Always very clean taste.
No problem w/ 6 second toots.
Juice hog if you do use 6 second toots.
Drains batts faster.
Leaks if overfilled; hard to tell when topped off.
Produces warm vapor; which I'm getting hooked on.
Draw is nice and light.
I have used up to 30% VG w/o issue.
If not careful you can waste lots of juice when filling.
Blow out excess and you have an excess mess.
CE2-X 5 (2.6ohm 3.7v):
Most leak free decent device I've found.
Can direct drip onto coil for priming.
Easy to blow out excess.
Looks cool.
Flavor on par w/ 3-4 second toots.
Longer toots can burn juice.
TH can be controlled w/ nic.
Vapor is thin and cool compared to dual coil.
Vapor production much less than dual coil; but on par w/ analog.
Draw very nice and light.
I use 100% PG and clear flavor to assure wicking.
Not a juice hog.
Easy to fill w/o wasting a drop.
Recommendation: One of each of course

I've been direct dripping since 2008...now my attys are starting to get lonely...these carts are just simply to convenient.