The Ryzen 1800X is about 10% faster on Resolve and 3DS Max than the Intel Core i7-6900K.
However on apps that don’t take advantage of all 8 cores, the Ryzen is considerably slower than the 6900K.
Not sure about the latest intel chips.
Some benchmarks here: http://www.tomshardware.com/reviews/amd-ryzen-7-1800x-cpu,4951-9.html