Debatable, Debatable, and just flat out wrong.
Stop. Voracek isn't the passer, playmaker, or defender that Giroux is, and he's not nearly as physical. I don't understand how you can be a Flyers fan and think differently because you obviously watch a lot of these games.
Voracek is good at using his size to protect the puck, and doesn't shy away from defenders, but he isn't "physical." He doesn't look to take the body defensively, or on the forechek as much as Giroux, and when he does he doesn't do it with as much force.
Voracek has a size and skating advantage over Giroux, as well as a better ability to shield the puck from defenders with his body. Stick handling is such a hard ability to quantify that it's impossible to say who is better when it's close, but Giroux as been much better on breakaways and shootouts where that stuff comes into play. Everything else: playmaking, shot, defense, pking, hockey IQ, etc, all favor Giroux.