<p>Maybe I didn’t read all the posts carefully enough, so forgive me if I missed this…
I was in mixed courses as a grad student. While we did sit in the same classes and have the same book, the tests were not the same. Grad students were expected to pull more out reading/lecture and so would, for example, be asked to respond to all question prompts rather than picking 3 out of 4. We also had more papers. No way were we getting graduate credit for doing only what the undergrads did. </p>