I delayed replying to this thread when it first started because I was dead-set preferring WOWs, but beginning to question that. At this point I'm pretty sure I prefer Coolcarts in-general/in-most-cases....
When I started a couple months ago, I loved the WOWs and was not at all sensitive to their heat. The past couple weeks though I've been feeling "burned" on the lips. Maybe I'm puffing too much, or whatever. WOWs do make more vapor, and some flavors "taste" best to me in them (wowbacco, No.7 come to mind). But to me, most other flavors taste best to me in coolcarts.
I am also finding (again, in-general) that I prefer the auto battery functionality, but manual on my PT. Now, when I'm vaping WOWs I usually go for a manual battery so that I can cut off early and draw cool air thru it at the end of a puff. I'm also starting to use a drip-tip more. These are all trade-off considerations, so I'm about ready to commit that "coolcarts are my favorite in 90% of cases", and leave the 10% to "when I can be bothered to use a manual and drip-tip".