Sorry about the delay, I have them all out now, looking west toward sunset out an open door at trees 200 yds or so distant. The old VX-I is definitely outclassed by everything. To my eye the Viper, Conquest, and Terra are all good optically, discriminating the LBJ birds (Little Brown Jobs) out of the leaves quite well.
The Conquest has much less of a dark ring than either the Vortex Viper or the Terra. Not a deal breaker, but I like the Conquest better. It does seem I need to move the Terra back in the rings a little due to the slightly longer stock on the 308 Ruger Hawkeye RSI it is mounted on, compared to the 375 Ruger Hawkeye African that wears the Conquest. This may affect the "doughnut" effect somewhat.The Viper moved from the RSI to my AR (MSR). Sunset is starting to show its color so low light testing shall commence.
The duplex cross hairs on the Terra are identical looking to the Conquest, and I am going to grab another Hawkeye, a 30-06 with a 3.5-10x40 VX-III for comparison too. This Leupold
duplex is much finer, on par with the Columbia/Kruger and the Vortex BDC reticules.
With 1/2 hr more legal hunting all are still fine looking into the east side of the undergrowth. Overcast conditions or one of JB's optics charts would make this part of the test better. The only conclusion so far is that the VX-I on the Sako Forester Deluxe 243 needs to go back to a backup roll.
15 minutes of shooting time is showing the Conquest contrast superior to the others. The Terra is next but the rest are holding their own.
Gonna post this and continue, almost a full moon rising so I may not get real low light for comparison.