It's best to keep the deflection yoke with its original analog board if one is unsure of compatibility. The only problem arises when transplanting between Classics and the compacts that preceded them. Within Classics or within the other compacts, the yoke can be kept on the crt and the pair transplanted as an ensemble.
But if one wants a simply-stated universal rule that doesn't require remembering any of the above, "it's safe to transplant just the crt from any compact mac to any other compact mac" is it. Following it avoids compatibilty problems completely, but can force you to separate a yoke from its crt unnecessarily (and obligate you to additional post-transplant adjustments that then become needed).