I can't seem to find a definitive answer anywhere, but are Mac OS X Security Updates cumulative?
The update in question is 2015-004. I've checked https://support.apple.com/en-us/HT204659 but it doesn't list any requirements.
Background: I've just finished deploying 2015-002 to some of our iMacs (running Mavericks 10.9.5), but now I see that 2015-004 is out. I was wondering if there was any point in continuing rolling out 2015-002, or should I just deploy 2015-004?