Given your interest and knowledge of scopes, I'm very surprised to see you write this.
Just to clarify, nothing I have written should be taken as a slam on Athlon or the Cronus. My only point was and is that simply being made in the same factory as a proven winner is absolutely meaningless, for a variety of reasons.
So to get back to koskin's post...Yes, the same basic design is used by several scope companies. I would have assumed that koskin knew about the differences and options available to prospective scope companies. The outer packaging is the least important aspect, and there are many options and price points for which internals are selected and what processes are used to help ensure repeatability and reliability, as well as ruggedness. There is a reason that the Razor II costs more (not much more, but more) than the Cronus. It has to do with what options Vortex spec'd and paid for, compared to Athlon. Same deal with NF, just that they literally take it to a whole other level of commitment.
If the Cronus is what you want, have at it. It seems like a nice scope. Just don't fool yourself (or worse, others) into believing that it is the same quality as much more expensive scopes, just at a lower price. There is no free lunch anywhere, especially in the scope world.
Athlon is near my office, and I have stopped by and chatted with the guys there. Very nice people and very knowledgeable about scopes and the scope industry. They believe that they offer a very good scope for the money, and I'm sure they are correct. None of them tried to tell me it was comparable to some of the others we have discussed here, though I think it certainly is close to the Razor in many ways.