Marillion and Rush have one thing in common...

[acroyear]

Everytime a new album comes out, the casual listener (and the detractor) will say it sounds exactly like everything they've ever done (or everthing they've ever done since album n which was their "best album ever").

Meanwhile, the fanatic fans will be impressed at how it doesn't sound like anything they've ever done before.

Any other bands like that?