I recently did the same analysis so I thought I'd post my thoughts...
I was replacing a B&R non-wheeled garment that I was accustomed to and loved (I could pack for an overnight trip with my eyes closed) but had fixed under warranty twice. Even though the bag was not technically a carry on I never checked it other than gate checking on CRJs. I was surprised to have it come apart on me the way it did, but I guess that's what the lifetime warranty is for...
During the same time period (8+ years) I have owned a TUMI expandable laptop bag that, though it looks a little ragged, I have never had to fix.
I compared the B&R and TUMI carry-on roller garments, as well as the B&R tri-fold compact garment as it was the closest direct replacement for my old bag (which I was replacing b/c it was stolen, not due to functional issues).
I actually used the B&R tri-fold for a trip before returning it. The tri-fold design made it the right size for a 1 night trip but putting two suits and other required items into the bag was difficult and the tri-fold design turned the suits into a wrinkled mess by the time I reached my hotel. Immediate disqualification.
I took the compact garment back and looked at the B&R carry-on roller garment. I loved the B&R layout; it seemed to have the perfect pockets for everything for a 1-3 night trip and I loved that all of the pockets in the panel/flap were accessible with the bag open. I also liked that the flap had it's own hook for hanging the bag in the open position. However I was turned off by the exterior handle (which the salesperson told me was the genesis of the lifetime warranty) and the materials seemed to be of an inferior quality to what I was expecting.
I settled on the TUMI carry-on roller garment for a hundred bucks more, which stung. The TUMI's interior layout is less intuitive (maybe b/c I was comparing to the B&R that I owned originally) and the pockets are smaller. I was also surprised that there doesn't seem to be a good place to put an extra pair of shoes. However, the bag seems better built than the B&R, it doesn't have the wacky exterior handle, I have had good luck with TUMI's other products and it matches my laptop bag. Let's face it, matching luggage is still cool.