The Shadow has better ergonomics without a doubt a lot more room in the seat and a more comfortable reach to the bars. I have to say though, the stock seat on my last Vulcan had a bout the same comfort level as the Saddlemen seat on my Shadow.
The biggest complaint I have about the Shadow is the lack of power, HP and torque are both down on the Shadow. To get the same power in a Shadow you would have to move up to the 1100. The Shadow also feels heavier. The Vulcan was more fun to ride because it was sportier handling in the turns.
As far as the philosophical comment about Shadow's following things, that is spot on, it sure won't win any races with a Vulcan. But styling wise they are a better looking bike.
Thanks for the comments, I'm thinking seriously about switching rides from the Shadow to a 2004 Vulcan 750. Just weighing some options.