The AMD Ryzen 5 8500G is the objective winner of this comparison, securing victories in ten out of fourteen measured specifications. Its most significant technical advantage is the L2 cache, which is 300% larger than that found in the Intel Core i5-8400. This substantial increase in cache capacity provides the primary performance edge for the newer architecture, ensuring that the Ryzen 5 8500G maintains a clear lead across the majority of the evaluated hardware metrics.

Users prioritizing modern hardware specifications and the benefits of a significantly larger L2 cache should choose the AMD Ryzen 5 8500G. Because the Intel Core i5-8400 failed to outperform its competitor in any of the fourteen measured categories, it remains a less viable option for those seeking the most advanced component. The Ryzen 5 8500G is the logical selection for anyone requiring the superior technical foundation provided by its winning spec count.