The best example of a 433 being more 433 than 451 off the top of my head would be Man U when they had Ronaldo, Rooney and Tevez interchanging, passing and moving etc. All 3 are capable of defending from the front and bursting forward at pace. Not many teams have the players to pull it off in that way though.
I suppose another example would be Barca with Neymar, Suarez and Messi. Or old Barcelona and Holland teams. Thinking of players like Kluivert or Eto'o being flanked by the likes of Overmars, Zenden etc. They are more traditional wingers but they were given a lot of attacking license. That's how I would see us playing it in the long run with Adams and Done wide but encouraged to get close to Sharp when we are in possession. As it stands, Sammon would probably be one of the wider players but he is more of a natural centre forward so the front 3 would probably be a bit narrower.
I think it could work for us in some games but like all systems at this level, there would be times when we got overrun in certain areas and we would bemoan the fact we don't have hte personnel and say switch back to 442. It's always the same when we don't win. "Change the formation" " get it down and play" "go more direct". The grass always looks greener on the other side if your team have just failed to win a game.