The 34-year-old is out of contract at Old Trafford at the end of the season, but is expected to be offered a one-year extension.
While he feels that he still will be able to participate in the "big games", Ferdinand feels that he will not be able to emulate the intensity that Giggs shows.
"I'm just enjoying my football, playing in the big games, being a regular in the team," Ferdinand told the Daily Mail. "It enables you to hit a bit of form. I hope I can carry on.
"When you get to my stage you take it year by year. I'm working out my routine.
"But no-one else will be able to do what Giggsy has done. He's got a certain body type, works on it and gets the best out of it."
Ferdinand joined the club in 2002.