I got both of them today, so it's too early to give an opinion on which is better, but I will say that I love both of them equally so far.
I have a lot of RBAs and RTAs, and as of today they are my two favorites. No leaks, glass
tanks great flavor and vapor, and both easy to fill.
So far, I have only used the Kanger with a prebuilt coil, but it is performing very well. I'm really glad I have both of them.