Notice: Discounted R1000.00 for Cosmetic Imperfections.
The whole point of the 2017 MacBook Pro refresh was the addition of Kaby Lake. The 2018 advanced that a bit farther with Coffee Lake and DDR4 RAM in the 15-inch model.

Turning to the ever-useful Geekbench for benchmark scores, it's obvious to see that since the 2018 debut, Apple has undoubtedly pumped up Mac performance with Apple Silicon, and in a few different ways.