600E and 600X subcards

[cure]

Are the subcards from the 600E and the 600X compatible?

The information on the net is ambiguous on this point. Part Numbers include:
12P3313, 10L1335 and 10L1193.

The parts do physically fit the available slots, but both the subcards that I have are damaged, so I can draw any conclusion as to this and as to to whether the 600E and 600X that I am considering repairing have additional problems.