AMD Ryzen 7 2700U 's Advantages
Better graphics card performance
Higher base frequency (2.2GHz vs 2.0GHz)
Lower TDP (15W vs 25W)
AMD Ryzen 7 4700U 's Advantages
Released 2 years and 3 months late
Higher specification of memory (4266 vs 2400)
Larger memory bandwidth (68.27GB/s vs 35.76GB/s)
Larger L3 cache size (8MB vs 4MB)
More modern manufacturing process (7nm vs 14nm)