I can't speak to any of the Tract scopes parallax as the 2-10 Toric I use doesn't have a parallax adjustment...and I like it without it.

I can speak to the 2.5-10x42 NXS parallax being very finicky on getting the parallax exact.

Just came in from a couple of hours of shooting. If I've counted correctly I think the Toric is ~8 rounds away from 900 through it. 28 loaded rounds left on the 3rd loading of 300 Alpha brass + a 20 round box of factory Winchester. Mirage was killer today.....