I’d get the box. It’s not a good rack. it’s not adjustable, very sturdy and has no spotter arms for squats or BP. A box needs to be well made to carry your weight and I would also buy a proper one, not just use anything. Also I wouldn’t do any BPs off any box for sure. You need proper form and you’re not gonna get that on a box.
Also, not relating to Jen’s Q, wanted to remind ppl of these threads for running, general nutrition, gadgets, whatever.
Fitness/Gym/Health Enthusiasts (TW gym attire, diet discussions Rules #6 and 7 apply)
Just to keep the topics neat and this space focussed on weightlifting. 
Edit lol sorry I think some previous posts got binned, this did make perfect sense before I swear. It’s still good advice so imma leave it as it 