Intel Core i9 9900K 's Advantages
Higher base frequency (3.6GHz vs 2.4GHz)
Intel Core i9 9980HK 's Advantages
Released 6 months late
Higher specification of memory (DDR4-2666 vs DDR4-2666)
Larger memory bandwidth (41.8GB/s vs 41.6GB/s)
Lower TDP (45W vs 95W)