Wilkup,
I have had both. I had a NX8 2.5-20. There was no doubt you could use it to hammer your tent stakes in and then go hunt with it, but for my eyes it lacked optically. I could never set the parallax perfect for my eyes.
I now have the Steiner H6Xi 2-12 (wanted the 3-18 but found a deal I couldn't pass up). Tracking is spot on, zero stop is easy to set (don't tighten the set screw past finger tight or it will stop one click short) and zero complaints optically. My first outing with it, I zeroed it and than immediately went out to 700 yards with first round impacts. I love the scope and plan on getting the 3-18 for a different rifle this year.
Hope that helps. If you want something more specific let me know