AMD Ryzen 7 5700G's Advantages
Higher base frequency (3.8GHz vs 3.4GHz)
Larger L3 cache size (16MB vs 8MB)
AMD Ryzen 3 8300G's Advantages
Released 2 years and 9 months late
Higher specification of memory (DDR5-5200 vs DDR4-3200)
Larger memory bandwidth (83.2GB/s vs 51.2GB/s)
Newer PCIe version (4.0 vs 3.0)