so these days 10GbPCIe and 10gbe are essentially the same thing at the low level silicon/pins/wires level the bit packing/unpacking/signalling stuff has a whole

so these days 10GbPCIe and 10gbe are essentially the same thing at the low level silicon/pins/wires level the bit packing/unpacking/signalling stuff has a whole lot in common and they're all sort of converging on some superset of hardware serdes - the higher level hardware stuff is still different (ethernet MACs vs PCI etc) of course