Redknapp welcomes the club that sacked him at the end of last season to Loftus Road on Saturday and has watched his successor, Andre Villas-Boas, guide them to third in the table.
Survival, by contrast, is the challenge at Loftus Road and Redknapp knows the league's bottom-placed side face a tough task to make his reunion with the north Londoners a memorable one.
"Spurs could field two teams who could compete in the Premier League," he told the Evening Standard.
"They have a second team who would hold their own at the top level without any problem. For a start, they have five top-class centre-backs.
"They can afford to let Danny Rose go to Sunderland on loan because they have people like Benoit Assou-Ekotto, Kyle Naughton and Kyle Walker in the squad. They have loads of top-class midfielders.
"They're full of quality everywhere. It's a similar group to the one I left but then Mousa Dembele has gone in and done well. They have an outstanding group of players, no doubt about that."
Redknapp had guided Spurs to their second fourth-placed finish in three campaigns before he was dismissed, but denies any ill-feeling towards his former employers.
"It will be strange but time moves on and I have no bad feelings towards Tottenham," he added.
"I don't live my life like that. I had a great time there, I loved the fans and they were great to me.
"Not many people walk away from a club as popular as I was at that time. Normally when you leave a football club, you go out with the fans shouting for you to go but I never had that. The people treated me absolutely brilliantly."