The Kissbox and the SD each have their advantages and disadvantages...
Kissbox:
larger cart size
switch position
lighter (weight wise)
interchangable manual/auto switch
Screwdriver:
Cheaper batteries
Better Battery life
Hand built - Trog's service is impeccable
tighter draw
warmer vapor
The SD would be my go to devise except for 1 thing....the adapter that allows the SD to run 801 attys - Trog was having trouble with them, stopped producing them, and the one I have is inconsistent so I no longer use it. Overall, I use both about equally.
Astechically, I like the overall look of the KB over the SD - long, slim, and sleek.
I say you would be happy with either - I'm certainly happy with both of mine....but that could change, as I pre-ordered the Stick and am waaaaaaaiting....