I have both the Falcon 2 and Rush 12. I've never used either of them for EDC mostly as a carry-on on trips. Both bags are well constructed and look like they would not wear out. I am big (6-3 330lbs) and I like the way the rush 12 fits better than the falcon 2. My wife likes the fit of the falcon 2 better. It's not a major difference for me, but if I was going to carry it every day I would want the one that feels better. As far as internal organization, I like the falcon 2 better. (more separate pockets...this might be a bad thing depending on what you intend to carry.) I keep the Falcon 2 loaded as a psuedo BOB or get home bag in the car. (first aid kit, couple knives, emergency blankets, paracord, flashlight and batteries, etc.) For the limited amount of time I actually carry the bag the minor difference in comfort is negligible.
I don't know if you've considered it, but I EDC the Sitka. I like the built in water bottle holder and the ease of getting to my stuff. the trade off is being a one shoulder bag, when fully loaded I wouldn't want to carry it all that far. For my use, to the car, into the store, and around town it is perfect. On a hike, I'd take a full backpack.
I hope this was helpful.
Grizz