I've been looking at Browning B25 Superposed O/U lately and I've noticed that there are the models I'm familiar with (Lightning, Pigeon, Diana, & Midas). Also, I've noticed grades A1, B1, B2, etc. I understand that these letter/number models are the models sold outside the USA. Is there any difference in design, quality, fit, finish, etc. with the non-USA market models versus the European models? Are the European models a better buy as far as dollar value, but not necessary USA collector value?