Who they have historically underperformed against and gone into a tailspin after facing. How we do against the Marlins will say more about our chances to legitimately contend in the division. Facing the Astros is just a "is this team for real" kind of test.
Just my opinion of course.
Well, I'm thinking that since they're 7-7 even if they get swept, it's hard to justify any feelings that they can't/won't contend this year even if they lose this series.