Umm it's complicated. I think the B, BE and CE is a naming convention by an individual manufacturer. The panasonic ones I have are grey colored and say NCR18650 on the side and also say MH12210. They are definetly protected type. They replaced my cheaper ulrafire and are better, but they are a bit longer though. I have to really force them into my unltrafire charger. I think they must be 2 or 3mm longer, I can't find the old ones to measure both sorry.. Samsung are another good one.
Edit, here is a link. The ones I use are the third one along in the pic.
http://www.nakedvapour.co.nz/categories/batteries/panasonic-ncr18650b-3400mah-li-ion-battery