JESD204B device clk

If you look at the transceiver pin assignments, the ones for HSMCA seem to be all over the place, and are mixed in and around the PCIe ones. Whereas the HSMC B ones are fairly well grouped. It's probably better in terms of jitter performance to have them all nearby. But also if you want to add PCIe stuff to your design (don't know if you are), then there may be fitting problems. Not sure, just a thought. If HSMCA works for you, use that one.