Yeah, the new nightforce optics look very attractive, but the model you mentioned weighs over a half pound more.
Not that there's anything wrong with it, but for an ultra-light build the ZL3 is the best choice in weight for an optic that will cover mid/long range properly.
Having said that, ultra-light and light weight rifles are kind of a niche, if I had to pick between the two I'm not sure I'd take one over the other, definitely exciting to see this as an option though. Would be perfect on my composite 788 6.5cm carbon/composite project for a test and review but beyond my budget a bit.