Hi Breyt,
When I did my focus training (what seems like many years ago now), I was told the following:
SET ALL=OFF is the same as MATCH .... OLD-AND-NEW
SET ALL=ON is the same as MATCH .... OLD
SET ALL=PASS is the same as MATCH .... OLD-NOT-NEW
I have never tested the above so I suggest you do some small scale tests first.
Regards
Tewy