VPX Radial Clock Vs Bussed Clock
Radial vs Tree vs Bus architectures are pretty well defined on the web.

When latency is critical so that differential measurements depend on null differences such as some analog RADAR measurements you want RADIAL.

When you can re-sync data to either edge of the clock, then a BUS will do and latency may be computed like RAM for core clock cycles of delay for read, write , address etc operations.

OpenVPX is the new military std that replaces VME for defining RF interfaces etc.