Hands down it is BAMF Forever, haven't had any issues with the rom... I have customized mine to my liking and did some framework and system changes and the rom hasn't missed a beat.
I did not like the look of the icon package that was used on cube but that is just me, the rom still seems stable and smooth but BAMF Forever has always brought my back after testing others.
The plus and minus factor will depend on the users choices... I have to have the stock Mobile Hotspots which I had issues getting that to work on Cube but no issues with Forever. The kernals seem more stable for overclocking on Forever for me but there is new custom ones made for Cube now that I haven't tried..
In a nut shell you need to try both and see what works for you, you can't really go wrong with either one.
Check out bamf skyraider Zeus. I just installed it and it seems to be running very well. Has a couple cool features that I didn't see when I was running bamf forever. It also has the ring lockscreen which I like but no stupid carousel.