Brooks bought Wrights and after that apparently the leather was "inferior" in some way - presumably so Brooks was the premier mark.The Wrights saddles I liked but the leather seemed inferior somehow to brooks
Before that apparently they were roughly equivalent.
My Wrights have 4mm leather vs 5mm for Brooks.
In theory the Brooks will last longer, but given my Wrights are already over 50 years old I won't live long enough to see any difference.
There's also a possibility they will break in a bit faster.