Intel Core i7 6820HQ's Advantages
Higher base frequency (2.7GHz vs 1.6GHz)
Larger L3 cache size (8MB vs 6MB)
Intel Core i5 8250U's Advantages
Released 1 years and 11 months late
Higher specification of memory (DDR4-2400 vs DDR4-2133)
Larger memory bandwidth (37.5GB/s vs 34.1GB/s)
Lower TDP (15W vs 45W)