I have both. My Axiom is an AO serial number, which is the newer one. My Scout is a double digit serial number, so one of the first ones sold. The tennons are the same, as I have a Proof prefit for a Terminus Apollo that fits both and headspaces the exact same. The noticeable differences that I have seen are in the rail, finish and the ejection port. The ejection port on the Scout is the same as the Valor, just as stated on their website. The finish on the Scout is also a "raw" finish, as it is less machined than my Axiom. I compare it to a bead blasted look verses the polished look of the Axiom. The rail is an anodized aluminum rail verses a steel rail. My bolt for the Scout is where I question if I got the better end of the deal. I believe that they sent me an Axiom bolt, as the back of it has the standard angular fire control group like the Axiom bolt, not the rounded one like shown in pictures on their website. That would lead me to believe that the bolts are the same. I have not attempted to use the Scout bolt in my Axiom or the other way around yet. Hope this clears up any questions you have.