Intel Core i5 8400H 's Advantages
Higher base frequency (2.5GHz vs 1.8GHz)
Larger L3 cache size (8MB vs 4MB)
Intel Celeron 6305 's Advantages
Released 2 years and 5 months late
Better graphics card performance
Higher specification of memory (3733 vs 2666)
Larger memory bandwidth (51.2GB/s vs 41.8GB/s)
More modern manufacturing process (10nm vs 14nm)
Lower TDP (15W vs 45W)