I'm on the fence with Key, honestly, especially coming off of a shoulder injury. He has a lot of "old man YMCA" to his game that I'm not sure how it translates to the SEC. To me, there is a significant difference in athleticism between Murray and Key, and Murray has proven his athleticism at the SEC level. Both have awkward-looking perimeter shots, but it seems to work. The additional 3 years of eligibility is a plus to me, as well.
I'm not sure anyone is arguing for Key over Murray, but to me, there is a significant drop-off from Murray to Key, so like you, I'm not entirely comfortable with Key being the consolation prize if Murray ultimately chooses Georgetown.