I got to compare my Cabela's $299 Vipers against the Maven C1 both in 10x42 over the weekend on a spring bear hunt in Idaho. Both binos are amazing regarding the optical quality. To my eyes, the vipers had a slight optical edge over the Mavens regarding clarity. They just seemed to pop a little better and the image quality seemed a little more crisp. My friend who owns the Mavens agreed. That being said, it was a pretty minuscule, and I think it really comes down to the users eyes to determine which is "better". The Mavens have a slightly larger FOV. Weight was about the same. The Vortex pull ahead with the feel of the adjusters and eye cups. The Mavens eye cups feel a little cheesy compared to the Vipers. I like a lot of eye relief with my binos, and the Vipers provide more of that over the Mavens. The Viper eye cups click and stay in place, where as the Mavens felt more like my crossfire eyecups. They both fest very comfortable in my hands.
You can't go wrong with either or.