Oh, the Xeons are with the vX vs vY nonsense, where the same number but a different version is an entirely different CPU (like the 2620 v1 and v2 are different microarchitecture generations and core counts). But, not to leave AMD out, they do things like the Ryzen 7000 series which are Zen 4 except for the models that are Zen 2 (!). (yes if you read the middle digits there's some indication but that's not that helpful for normal customers).