They can be compared for the simple fact that just like every GM would want Mauer on their team, every GM would also want an Adam Dunn on their team. No one saw Mauer hitting only 3 HR's this year and not playing much, or whatever the case turned into for him. And every single baseball expert has been mystified about Dunn this year.
No one in baseball could have foreseen this type of season from him. No one. Yet there are fans calling for KW's head for signing Dunn. Listen, KW has made plenty of mistakes that he can be blamed for. Dunn is not one of them. He could not in any way, shape or form predict this would happen. Just like the Twins' GM with Mauer.