The screwdriver uses standard 901 atomizers, yet it has the battery power to run a pen style 801 atomizer.
You can not compare a 901 to a 801. The 901 has half the vapor and
throat hit that a 801 has.
Now the screwdriver does have a manual push button so you can cook the atomizer as long as you hold the button so if you are a risk taker you might match what the 801 can do if you cook it for a while, but the 901 atomizers have a high death rate at that heat level. I burnt 2 atomizers on my screwdriver trying to do a big hit.
I love the look of the screwdriver and it does work great, but after smoking the pen on a usb manual switch going back to a 901 atomizer on any battery source is like going to a light cigarette when your used to smoking camel filterless.
I know being tethered is not everyones cup of tea, but when you are on it, you will see what im talking about.
I think the major problem I can see going with a smokestack like this is getting more addicted. Im sucking on this thing all day long, I think if I tried to switch for a day to a 901 id probably kill someone.