Wirelessly posted (Blackberry 8700: BlackBerry8700/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)
I'll take the 777, please. You're selectively choosing "comforts" like aisle width and middle-seat percentages (which most here could avoid on all but a last-minute, irregular op change).
The seats are incredibly thin on the RJs, there are no galleys for food, you generally get fewer lavatories per passenger, and the height is significantly reduced, making the long walk to the lav that much more miserable. No IFE (not even audio), and the list goes on. Of course, I'll trade all of those for an inch or two less in the aisle.