If you’re talking about the JSB RS pellets I’d agree hands down. I’ve only done my testing with them sub 35 yards but they’re amazing. They work in pellet fussy guns, and everything I’ve shot them out of in 177 and especially 22. Magnum springers and sub 10fpe springers.
As far as the BSA... as mentioned I remember a good deal of fanfare when I was getting into airguns. They were certainly on my radar. But as we all know we airgunners have what we like. And when newbs come in they either fall for the marketing hype of whoever’s pushing the hardest or they turn to a forum and are absolutely bomblasted with HW97, HW30, R9 posts where they might believe those are the only airguns ever produced. I have guns I’d put up against anything else that were literally less then have the money but receive a little TLC but it doesn’t have the name, the bluing, the history, and the pretty stock. Still shoots and handles very nice. Besides most everyone that’s been around for a while likes BSA unless times have changed again on me.