This is the same card as the SPEC FMC carrier where a larger FPGA is used.
This larger version is notably required when one needs White Rabbit support with the FMCADC100M ADC mezzanine card. Usage in the White Rabbit Trigger Distribution project is such a case.
SPEC 1.1 first prototype*
Request if can provide in SPEC150 version:
Erik van der Bij - 15 June 2020