I was on the verge of buying a Walden N550CE when I noticed it was fitted with a B-Band capsule (T-35, I think)

I'm used to seeing them with Fishman pickups... I've got the feeling these guys might've replaced it on their own and tried to sell it like that...

What can you tell me about these pickups, compared yo Fishman classic and Aero, at the same price?
Ok, it definitely can have a B-Band... Still, for the same price and between Fishman Aero+, Fishman Classic 4 and the B-Band T-35... Q
what do you think?