I’ve owned them both. T6XI is great with locking turrets, 56 mm objective is bright, but the MSR2-MIL reticle below 8x is too fine & somewhat unusable
@C_Does , green illumination, smaller illuminated reticle, locking diopter, good connecting lens caps but they don’t lay flat, comes with sunshade, bigger turrets. I didn’t see the point of having an unusable reticle below 8X so sold it.
H6XI is 3-18 (not 16) has no locking turrets, smaller 50mm objective, I had the MHR-MOA reticle with thicker center reticle, red illumination, larger reticle illumination, no locking diopter, the ocular lens cover wouldn’t stay on with the diopter dialed out, no sunshade, lower profile turrets. I had hoped that the larger, red illuminated thicker lined reticle would be better for hunting. It was OK at 4-5, but the brightness level wasn’t sufficient, so I ran it with an offset red dot. I was annoyed with having to run an offset red dot in short, dense woods so I sold it.
Every scope has a philosophy of use. For PRS the T6XI is great. If you wanted to hunt long range the locking turrets are exceptional and it’s a tank (heavy, but SOLID). The H6XI is a great hunting scope due to its light weight, low profile turrets, and thicker & larger reticle red illuminated area. Although the H6XI elevation turret doesn’t lock, it’s stiff enough not to be of constant concern. Both T6 & H6 turret clicks are a bit mushy and the illumination is good, but not daylight bright.
I sold them both and just purchased a Zeiss S5 LRP 3-18X50 in MOA. Side by side with T6XI 5-30X56 (which I still own also) the Zeiss Schott glass is clear edge to edge, contrast & color is detailed, super daylight bright illumination, better but not excellent turret clicks, thicker usable reticle down to 3X. The T6XI on the same magnification levels have a larger FOV and is brighter due to the 56MM objective.
I love Steiners! Their reticle designs need help, the turrets should have more tactical clicks, their glass beats most all scopes in its price points, and they just look COOL! If your use case mitigates some of the individual shortcomings, you’ll be very happy. On a side note,
@C_Does has helped me understand what makes and breaks scopes. Scopes are the sum of all of their parts/features, there is no perfect scope, and his videos are thorough & best-in-class!