AMD Ryzen 7 7736U 's Advantages
Higher specification of memory (6400 vs 5600)
Higher base frequency (27GHz vs 3.8GHz)
Lower TDP (28W vs 35W)
AMD Ryzen 7 7840H 's Advantages
Better graphics card performance
Larger memory bandwidth (89.6GB/s vs 76.8GB/s)
Newer PCIe version (4 vs 4.0)
More modern manufacturing process (4nm vs 6nm)