After checking out the Core i5 and Core i7 SKUs, we're now finally ready to benchmark the Core i9 version of the XPS 15 9570. In short, users are better off investing in more storage, RAM, or faster graphics than to plop down an additional $250+ for the Core i9-8950HK.
https://www.notebookcheck.net/Dell-XPS-15-9570-i9-8950HK-4K-UHD-GTX-1050-Ti-Max-Q-Laptop-Review.355641.0.html