AMD Ryzen Z1 Extreme 's Advantages
Better graphics card performance
Higher base frequency (3.3GHz vs 3.2GHz)
Lower TDP (9W vs 15W)
AMD Ryzen 5 8540U 's Advantages
Released 7 months late
Higher specification of memory (LPDDR5x-7500 vs DDR5-5600)
Newer PCIe version (4.0 vs 4)