No; just as bad. No idea if he "shared" or "traded" secrets, but also no idea if anything was accessed by foreign powers who could easily have assets inside MAL.
SC should not be ruling on that issue; the issue at hand is the election case and his "immunity claim" there.
And there is nothing at all in the Constitution about any President or former President being immune from actual crimes committed, while in office, before, or after. In the docs case, it is clearly "after", and there cannot be any reasonable rationale for immunity - it is up to the prosecution to present and a jury to decide the charges based on the established laws.
SC conservatives are absolutely looney in their arguments on this issue.