I have an SE along with the 510 titan. The SE is a decent
vape, albeit an expensive one, but a good one. As Duckies mentioned it is the same as the RN4081. It is not a great one, the 510 is much better but the SE is nice change of pace, especially with the auto battery.
I found a place where I got my accessories for it to keep it going when I'm not
vaping the 510. Preferentially, the 510 is a much better
vape overall but the SE is a good back up...much better than my 401 that I have.