The master phrased it well… 
In this context, I have never looked at the Aio.
But while I have to disassemble it.. remove it.. drain the liquid etc. for a cotton change, an RTA is much easier to operate.
And here too, the exception is if it’s an RDTA atomizer because there you just need to unscrew and take off the top cap..
The Stubby always wins no matter how I look at it. 
But there are still a few RDTA glass atomizers…