If I remember right, WC hasn't always been planned to be a place where the waiters give you a hard time, liven it up, etc but it evolved into that... but not all waitstaff participate... so its hit and miss.
But PT has ALWAYS been that kind of place, it was part of the plan for the restaurant, so each waiter is supposed to be playing that role and even if they arent over the top goofy like some, they all participate a bit in the game.
So you're usually guaranteed a hard time at PT, esp if you request a very interactive waiter, while at WC you may not even be seated in the main area or have an interactive waiter.
We have eaten at PT sevearl times and LOVE the food there. Thats why we go. =)