Intel can do more per tick.
AMD can do 2-3 things per tick, Intel can do 4-5 per tick. multiply that with frequency and you'll see...
and AMD and Intel have different approach to how power should be distributed
AMD uses modules (two glued cores make a module - imagine they work like a three legged race - slower but can do more with 4 arms) and Intel uses single cores (like a runner which can run more than double the distance given the same amount of time).