Less so, obviously. Even if her choice was ultimately co-opted by the vast left-wing propaganda machine, Sheehan did make a choice. Schiavo never even had that much of an opportunity; here choice wasn't co-opted by the vast right-wing propaganda machine, it was made for her.
Bottom line: they're both disgusting situations. They're also both situations that, when it comes to the politically minded exploiting people for their own purposes, are par for the course.