intel or AMD (and video card) to use with Premiere and After Effects to edit 4k and raw images?

the answer is actually tricky because of hidden costs of intel motherboards. you can get ryzen boards for $60.

use pcpartspicker to compare final price. you should be able to get a new computer for $1100-$1500.

"the Intel Core i7 7800X is a hair cheaper than the AMD Ryzen 7 1700X while being slightly faster for exporting/rendering previews and about 24% faster for warp stabilize. Averaged out, this makes the i7 7800X about 10% faster overall for $10 less."

"X299 motherboards do tend to be around $120 more than the lowest end AMD motherboard which will negate most of this pricing advantage"

https://www.pugetsystems.com/labs/articles/Premiere-Pro-CC-2017-1-2-CPU-Comparison-Skylake-X-Kaby-Lake-X-Broadwell-E-Kab…

as for the gfx card,

"The GTX 1080 Ti is about 14% faster than the GTX 1070, 9% faster than the GTX 1080, and about 1% faster than the Titan X"

https://www.pugetsystems.com/labs/articles/Premiere-Pro-CC-2017-GeForce-GTX-1080-Ti-11GB-Performance-912/

Unless AMD has made changes to their basic design, an Intel CPU has hardwired commands in the CPU that are used by Premiere Pro... commands that are not (or at least were not, I don't know about today) present in an AMD CPU