I don't know which one you would say is better, but I've never seen the pop-top. That's interesting, I'm tempted to try to find one - My Ruyan and the two 601's from my two different suppliers have the screw type cap. I wouldn't mind if the cap was just a little easier to get off sometimes, a notch or some other way to get a little traction with e-
juice slick fingertips would be nice. Luckily the battery lasts for long enough that I don't have to open it very often, especially with
three of them to rotate
through
The Ruyan is nice, but I don't know that it's 3x nicer than a regular 601. The warranty is better of course, but functionality is nearly identical. In my opinion anyway, which isn't worth a plugged nickel since I'm a supplier
