I have in hand both the C1 and B1 8x42 binoculars. While the B1 is a better glass, it is going to be hard to recommend the B1 over the C1 when price is an issue. They will both read the same level at the same distance on a multi colored USAF resolution chart. Mine has black, dark blue, light blue, red, green and yellow charts on the same sheet. The C1 has an understated fov. It says it is 341', but measures 367. The B1 is likewise understated actually being 405' vs the 381 listed. The B1 is a touch better reading green and yellow on the chart. The B1 is a touch brighter, but the two need to be side by side for the difference to come out. Actual field use it is unlikely a difference can be told. Another thing the C1 has in its favor is a pretty small size for a full size 42 mm glass. Maven got a hell of a lot of optic under the hood for $325. If bang for the buck is a major concern, the C1 is the deal.