He told the Manchester Evening News: "There are similarities to Eric Cantona. He has got the same presence about him. He's very skilful and scores the tap-ins and the awesome goals.
"But he has other qualities as well. He's got the height which United haven't really had in their regular front men since Ruud van Nistelrooy left.
"You don't see Berbatov being knocked off the ball or getting the ball nicked off him. He's not got electrifying pace but he's not slow."
Berbatov has been labelled lazy despite posting goal figures of 46 goals in 101 appearances for Spurs since joining from Bayer Leverkusen in 2006.
But Ritchie believes Sir Alex Ferguson and Co will inspire more graft from the Bulgarian.
"It is almost a pre-requisite at United that you have to put in the work," adds Andy. "But I think that can be brought out in him. Not everybody has it on arrival but being in that environment brings it out in everyone.
"I think Berbatov would become a more complete player at United. You have the two smaller workhorses like Wayne Rooney and Carlos Tevez who will put the miles in for you. Tevez was amazing last season I saw a figure that he ran 7km in one United match.
"Berbatov will have fantastic work rate around him but I think that will also motivate him to put in more hard work. In Sir Alex's era he and his backroom team have always managed to make players better. They always get the best out of players and then that little extra.
"Look at Cristiano Ronaldo, for instance, the club has certainly brought out the best and more in him. I foresee that happening if Berbatov signs. He's made people sit up and take notice of him at Spurs but a club like United could make even more of him. He can only get better. If United get him it will add something extra to all the qualities already in the squad. It's just what you need when you have just won the title and the Champions League. It keeps you moving upwards."