A ffp pst is much cheaper than the equivalent ffp f1 nxs, over half the price with more magnification and a somewhat better reticle in my opinion.
Glass is very similar?
Did you get my pm?
The older 4-16"s had quite a bit more CA than the 6-24. The newer ones are similar to the 6-24 but the 6-24 is noticeably brighter and ever so slightly crisper. This is comparing 3 viper hs 4-16 to 3 ffp 6-24.
Haven't ran into any problems with all 6. Track well and function as intended.
Depends on the hunting, sporter barrel is very accurate but is not the one you want to sit and target shoot with all day, I prefer the heavy barrels for better shooting over carrying, an carrying them is no problem to me.
check out this thread
http://www.snipershide.com/shooting/snipers-hide-rifle-scopes/264344-vortex-viper-pst-6-24x50-ffp-ebr-2c-unboxing.html
personally when i get my razor im going to go the 1c, i have no gripes with the ebr1s in my PST's and like the clean look reticle.