This is going to be a very opinionated question, but I can definitely give you my opinion! I love the AMR's, they're definitely my personal favorite wheel. It really depends what style while you like. If you're into the 5 spoke design then the GT premium wheel, Saleen wheel etc.. may be perfect for you! However, if you're into the Mesh/Drift inspired design then the AMR is exactly what you're looking for.
On a black 10+ Mustang, you really can't go wrong considering it already looks amazing. Either of these wheels will look great, go with whatever you like best!
I hope this helps. Let me know if you have any questions or need some assistance! Our Mustang Experts are here Monday-Friday from 9AM-9PM EST and Saturdays from 9AM-5:30PM EST. If you want to hit them up, their number is 866.727.1266. I can also have one of them call you directly.