Price them both and then decide. Before I bought my 1500 ZR2 I was shopping AT4 and Trailboss. I actually ordered a AT4, then later canceled it for a ZR2. But if you want a lot of the options. The prices get real close. IE a Trailboss is cheaper starting out. But if you add 360 camera's, 6.2, Ect. They actually get up pretty close in price. It's been a min, if I remember right. It was around 4200 more for a ZR2 with tech package compared to a loaded up TB. Shocks, lockers, skids, ventilated seats, camera mirror, heads up display plus a few other things were only on the ZR2. To me the 4200 for all the extra was worth it. Like anything, Figure out what options you care about, then cross shop.
To me just the shocks and a rear locker are worth a few grand extra. Not hard to spend a couple grand just on some decent shocks. I think a E locker should be an option for any 4wd. It's crazy to me that gm still only has g80s in everything. You can option a locker in a pretty basic model ford. It's crazy you can't even get a rear locker in a TB. I live in the south where it rains and we have mud, lol. Often by the time a g80 engages. You are already stuck.