Grid Card
In a grid, cards will fill all the available vertical space.
Longer Content
In such a case, all of the grid card's footers should be vertically aligned. Meaning, they should always rest in the bottom of their card. Even when one card has much more content than its neighbour, and thus fill more vertical space in it's body, the footers should still be aligned.
Grid Card
These kinds of situations should best be avoided. See the guidelines for more information.
This card has no header and short body content.
No footer, More Content
In such a case, all of the grid card's footers should be vertically aligned. Meaning, they should always rest in the bottom of their card. Even when one card has much more content than its neighbour, and thus fill more vertical space in it's body, the footers should still be aligned.