I think you'd be better off waiting and reading it in one sitting.
I liked it.
I'm not going to be able to get Part 3 of Sacrifice for at least a week, and I may not be able to get the Wonder Woman issue today. I should be able to grab OMAC 4, though.
Will I really be confused, like Rucka says, if I just read OMAC 4 before finishing Sacrifice? If not, should I wait anyway? Are the revelations in Sacrifice so amazing that no 3-4 panel recap in OMAC will do it justice?
I think you'd be better off waiting and reading it in one sitting.
I liked it.
I think you should wait and read them both in order.
You won't be confused, but a couple of interesting developments will have played out, and to read them out of order may diminish the impact of these events.
Bookmarks