Eventide h8000fw Clock or RME UFX clock?

hi! i have a Eventide H8000FW with a RME UFX and a UAD Apollo quad (plugged in via ADAT)

which clock is the best to use as master? the H8000FW or the RME Ufx clock?

thanks!

Eventide h8000fw Clock or RME UFX clock?