I've never looked through an Argos, so I really can't answer your specific question. However, my example of the Ares BTR (2.5-15x50) has very good optical qualities. In the range of magnifications where it overlaps my Sightron SIII, there's not a great deal of difference that I can see. The BTR is supposed to be Athlon's attempt to compete for sales of the Viper PST II, and I think they accomplished that goal in everything but the turrets on my Gen 1 - not that the turrets are bad, but they're not as crisp as the PST II I've handled. The Gen 2 Athlon turrets are supposed to have improved feel.