Kimmy..Here are comparing pics of the TMA in Taupe and the Rock me in Purple pebbled..both stock bags.
The Purple is
NOT more than max 1,5 cm longer, but shows a good deal longer , because I had not been too great in stacking them on top of eachother..
Picture 2 and 3 show what had irritated me with the Rock me in stock bags ...( with the TMA , I always request the three rings to come detachable..not allways I feel like having extra weight with me)
First..the pocket, which was not going all the way down, but stopped at the middle..I got my BEC Rock me with pockets all the way down..no extra charge..and I don't know if this is a standard feature now or not. But the way the pocket stops, will make a fold, which really annoys me..
Second..and I became aware of it after some use of the bags..is the magnet closure..it'll poke out like a sore eye!

So unless it is a magnet on a flap or to close the bag, I ask for a 'popper' to avoid this happening on some pockets. ( but the atalier can change this fairly easy according to jackie, so when the leather gets worn too much, I will go to a cobbler to have this fixed)
You can also see tha TMA a little fatter than the Rock me on the last picure..
Finally..and I should have thought of picturing it..I have more narrow handles on the BEC'd Rock mes..better to carry!
The Rock me weighs little less than the TMA..and has the advantage of two nice and large outer pockets..but overall they can both carry the same! I have them both just to be able to change style when either travelling/ shopping/ or just me hauling the kitchen sink with me..LOL!