Best not to test timing accuracy, because its shocking how unreliable it often is!
I spend years trying various setups and I can say that every device I have used syncs most of the time but will just do something stupid occassionally. My most stable setup at the moment is a tascam 2488 recorder sending MTC, a MPC2500 converting MTC to midi clock (and being my sampler), then the MD is excellent at syncing along to the MPC but the MnM won’t always start at the right time. Doepfer Dark Time syncs but will never start at the beginning of the sequencer.
As far as I am concerned, its not reliable until it is printed to a recorder track.
B