The major difference i found helpful in the digital version was the ability to link directly to the text from the question. When I was trying to do questions in the print version, and wanted to read up some more on the material, it took like 5-10 minutes of leafing and rummaging to actually find the text that was associated with the question. It also took some rummaging to find the explanation to the question in the back, whereas in the digital version, the explanation pops up after you click on the answer.
Another huge advantage of doing the questions in digital form is it simulates the test more, since the actual exam is computerized.
So i recommend going for digital. Dont waste your money on the print.
Oh and yes they are exactly the same, info-wise...