AMD Ryzen 7 6800U Advantages
Integrated graphics card
Higher specification of memory (6400 vs 5200)
Lower TDP (28W vs 55W)
AMD Ryzen 7 8840HX Advantages
Released 3 years and 3 months late
Newer PCIe version (5 vs 4.0)
Higher base frequency (2.9GHz vs 2.7GHz)
Larger L3 cache size (64MB vs 16MB)
More modern manufacturing process (5nm vs 6nm)