I can confirm that the miniSAS headers are missing on the Quanta boards too. The controllers are present.
The other differences that I've identified are that the WiWyn's are new, sealed in the box while my Quanta appears used (though very clean) and that the WiWyn includes a riser to split the 16x PCIe while the Quantas have a ConnectX-3 10 GbE in the mezzanine slot.
The other differences that I've identified are that the WiWyn's are new, sealed in the box while my Quanta appears used (though very clean) and that the WiWyn includes a riser to split the 16x PCIe while the Quantas have a ConnectX-3 10 GbE in the mezzanine slot.