Just under half of Pennsylvania Democratic voters have a college degree, about the same as in all other primaries so far this year--and more than Ohio's 38 percent.
In Ohio, college educated voters went for Obama 51-47, so that's good news for Obama.
On the other hand, more than 30 percent of primary voters are white Catholics, compared to only 20 percent in Ohio. Those voters went for Clinton 65-34, so that's good news for Clinton.
It could be an exciting night.
Update: MSNBC just ran a comparison of Democratic turnout in PA and OH. Overall, it looks like PA voters are older, whiter, and more rural. Good news for Clinton.