That's a desktop chip rebranded as Xeon, with a different set of feature flags. The server chips are a totally different beast, with many more cores, dual socket support, network on chip, AVX 512, upgraded connectivity etc.
These are different skylake xeons. Skylake E3 were available in 2016. They are limited to only 4 cores. The OP refers to the server-grade Skylake Xeons, previously referred to as E5 and E7. They will reach a lot higher number of cores.
