Intel Core i7 8557U 's Advantages
Lower TDP (15W vs 35W)
AMD Ryzen 9 4900HS 's Advantages
Released 8 months late
Higher specification of memory (4266 vs 2400)
Larger memory bandwidth (68.27GB/s vs 37.5GB/s)
Higher base frequency (3.0GHz vs 1.7GHz)
More modern manufacturing process (7nm vs 14nm)