II would agree that winning the show carres more weight that winning on tour as the TV show is what the majority of people watch and gets the most media coverage
Apart from having the trophy and the title I don't think there are anymore advantages to winning, as long as you remain on the show for a number of weeks I would think that you get the exposure you're aiming for for whatever reason, (public profile, job opportunities, charity etc)
but I also agree that obviously it's good to be in the last two so that you can skate your Bolero