I'd wager they are very different. I haven't brewed moose drool, but I've brewed Janet's Brown at least 5 or 6 times, and it's quite hoppy for the style. From what I remember from the CYBI episode on Moose Drool was that it was much more mellow.
Pretty good beer, but a few better ones around the state. Its unfortunate we don't distribute more of our beers. And import more east coast beers, like DfH or Harpoon.