Wanted to chime in here as I own the lite plus v2 and the 3.1
The 3.1 can open up wider than the lite and it does not have a whistle to it, while the lite has a better profile.
I wish they would combine these two features.
Out of the two I prefer the lite for aesthetics, but the 3.1 is a better over all vape. Trapping the leads are hard on the clones. I have tried it on @Spiri 's Kayfun. I couldn't do it as they keep sliding out. I don't have this issue with the originals.