eGrip II vs. Cuboid Mini. Trying to decide which one to get.

So I've pretty much narrowed my next purchase down to these two options. Same wattage and temp range, slightly bigger battery on the Cuboid mini. My biggest question is regarding using other tanks. The eGrip has the adapter, can anyone confirm that it works more or less as well as a mod with a built in connector? The difference in price is only around $15 so basically I'm looking to see if spending a bit more is actually worth it. Attempts to convince me on other mods are appreciated but will go largely ignored, I've made my decision, it will be one or the other, I just want to get some opinions on which one is the better buy.