I just took a look at the Bosch. It looks like you have to switch a button to screw or unscrew. The Dewalt, you twist counterclockwise and it unscrews, clockwise and drives the screw in. You don't have to manually switch directions.
The coolest part is the more you twist the screwdriver, the faster it will turn. You really have to use it to feel how awesome of a device it is.
Yeah, there's a switch to select direction. But it activates by pressure.
I'm either screwing a bunch of screws in or out, so it's not a big hassle to use the switch when you need the other.
And this thing generates so much torque, I feel kinda worried about twisting my wrist to select the direction.