I've shot the defiant and the Halon and they are both super close to each other. Both super smooth and fast as hell. I don't think you could go wrong with either one. My buddy just bought the Halon and loves it and I honestly loved the Defiant just a smidge, and I mean a smidge, more. Ergonomically, it just fit me better. My buddy just liked the Halon a smidge better, he shot them both for hours before he made the decision.