No contest BSA everytime. And yes I know I am bias, but in my opinion if you want an argument to end this particular debate you only have to go back to 1905.
After george Lincoln Jeffries invented the concept of an underlever air rifle using a rotary tap at the breech, BSA started the first commercial factory production of that first BSA air-rifle. Webleys have been playing catch up ever since
BSA's first air rifle 1905
Webleys first air rifle 1926
I rest my case
Lakey (BSA enthusiast till I die)