Difference between OCS and MCS?

What are the main differences (if any) between the OCS and the MCS?

I passed the OCS first time and the general tactics for it seemed to be “regurgitate technical knowledge and relate to the pre-seen + un-seen”.

Obviously the weighting for the technical marks is reduced for the MCS but I wonder if the approach should still be the same as OCS?

Any helpful hints and tips would be greatly appreciated!