The Sunday lunchtime clash sees the Premier League's joint top-scorers go head to head with Robin van Persie and Michu having bagged a dozen goals apiece so far this campaign.
Vorm, set to feature for the Swans after eight weeks out with a groin injury, said: "I think he is the best striker in the Premier League. Not just because he has scored 12 goals but because he is a team player. If you watch him his technique is unbelievable but he also works hard.
"Last season I think he was the player who covered the most ground in the Premier League as a striker and he scored 30 goals.
"Last season was his best season but he has a new club now and he looks like he has been there for years. He is 29 and at his peak and at the moment I think he is the best.
"He is so clever, when you train with players like that it is hard to read their game.
"With his technique he can shoot with both feet or he can backheel; he is very skilful.
"I never forget the game here against Arsenal last season where he scored the first goal.
"It was a narrow angle, he went to shoot with his right foot but then he dummied and he scored, I couldn't believe it. You can't read him and that is quality. You have to be on top of your game against him."