Visually, the UX580 is nothing more than a UX550 with a secondary trackpad display. Users not interested in the dual-screen capabilities of the UX580 can now get the UX550 with an Intel 8th gen Core i7 processor for $1800 USD.
https://www.notebookcheck.net/Asus-ZenBook-Pro-15-UX550-updated-with-Core-i7-8750H-CPU-option.321554.0.html