I figured you either didn't have the laptop at hand or the camera store, just wasn't sure which one
Trying bags with your gear is the best way to find out. I have packed and unpacked most of my stuff into 4 different bags, in the store, before I bought the 10.
I also agree with pbd, ThinkTank really forgot the laptop option on the 10 and 20. I personally don't miss it when I go shooting, but would be nice to have the option. Btw, the 13-inch doesn't fit comfortably into the front pocket of the 10, even without a sleeve.
For the actual travel time (on the plane etc) I don't mind taking the larger UrbanDisguise (I even take it as my only bag on 1-2 day trips when I don't take any camera with me). It has enough space for flashes, batteries, all the chargers we bring these days, books, magazines, etc. I don't mind walking around with it either when I travel and don't want to bring both bags. IMO it screams "Business trip" rather than "camera bag". The optional shoulder straps convert it into a backpack - that helps when you load it to the max.