I put them side by side, and shake the table to see which one is more sturdy. The original wins by far. It is also lighter, smaller, and better designed in general, IIRC closing the lid is safer on the Roost. (The Roost I have is V3.)
I am not 100% certain Nexstand is a copycat of Roost though.
https://www.nytimes.com/wirecutter/reviews/best-laptop-stand...
Also when I buy them, it is $90 vs $45 so the difference is not like the 6-fold you see.
Closing the lid is fairly safe on my old one cause it hits the rubber discs, but leaves a ~1cm gap. I'm generally pretty happy with it and I've had it the best part of a decade now; my only gripe is that it doesn't adjust as low as I'd like sometimes.
If I remember right, I paid something like £60-70 + Duty (to UK).
The new Roost v3 looks sturdier while the Nextstand looks like my OG Roost, which I note they've now discontinued looking at their site.