Seems everyone has slightly different experiences with exporting to Android. I've used C2 for around a year now and I still use CocoonJS. I'm used to the cloud compiler and options. I believe XDK cannot support Admob at the moment. For me:
Pros - Better FPS, graphics look better, game runs fine, Ads usually works
Cons - No multiplayer, no Clay.io support, Bad support from Ludeil themselves / no help with issues. Can't choose app permissions.
Pros - Clay.io support, Better support for issues, Seems better / more freuqent updates, choose permissions
Cons - Worse FPS from my Apps, Graphics export slightly blocky, App crashes sometimes.
I'm still stuck using CJS due to FPS although if XDK gets multiplayer supported I'll be jumping ship and looking to Iron out any issues with graphics / fps.