We're also now in a leapfrogging situation, where year by year this may change. AMD is one process node behind Intel; I'm not sure how to count microarchitectures, but ignoring processor interconnects (which Intel has only just started to address by copying the AMD approach) if you consider Core to be more advanced than K8 and Nehalem more than K10 then AMD is also one microarchitecture behind.
We're also now in a leapfrogging situation, where year by year this may change. AMD is one process node behind Intel; I'm not sure how to count microarchitectures, but ignoring processor interconnects (which Intel has only just started to address by copying the AMD approach) if you consider Core to be more advanced than K8 and Nehalem more than K10 then AMD is also one microarchitecture behind.