I rode both at the recent Afan demo day. I can say that both were excellent, but I was surprised at how nimble the Bronson felt. I feel that ~120mm travel is about the ‘sweet spot’ for the sort of rocky, xc, trail centre riding I mostly do, so was expecting the Solo to be pretty much bang on, which it was. But I was still surprised at how nimble the Bronson was.
As others have suggested, I’m pretty sure the Solo could capably handle virtually everything the UK has to offer, but for big Alpine stuff the Bronson would seem the more suitable bike. I’m not sure the Bronson offers much in the way of a ‘disadvantage’ over the Solo for everyday UK riding though.
Nevertheless IF I were to purchase one (in a few years once I’ve saved up my pennies!), it would still be the Solo, simply ’cause I think it fits better with the sort of riding I like to do.