Ares ETR is a little better in terms of optics, but I prefer the reticle in the PST Gen 2. ETR has a very nice reticle and I like the tree in it better, but the center dot is thinner than I like. Both have weird inconsistency between 0.2 and 0.5 mrad graduations that I do not like, but on balance, APRS1 is just thinner enough for me to prefer EBR-2C by a hair.
All that said, one does not stand out miles ahead of each other. Both have good turrets, although the feel is different.
Ares ETR is remarkable in that it is the best tactical scope I have seen come out of China to date. That is extremely impressive and I really want to see Athlon extend the ETR line.
ILya