Lippi, who also led Italy to World Cup glory in 2006, has told Goal that the Serie A champions have qualities that Barca have yet to face under Luis Enrique, making them something of an unknown quantity to the Catalans.
"These are the best two teams in Europe this season, but when a team gets to this point in a continental competition there are no certainties," explained Lippi. "In my opinion, Luis Enrique and his side have not faced a team so compact, sturdy and so willing to defend as Juventus.
"But the Bianconeri also know how to counter-attack with speed when they regain possession, and this could be a factor in how the game turns out. Barcelona are favourites, of course, but I don't think it will be as easy for them as many seem to think.
"The Catalans have Martians in their attack in Lionel Messi, Neymar and Luis Suarez, and that will make life very complicated for Allegri. But Juve are organised and tough, and we mustn't forget that Buffon is one of the best goalkeepers in the world. I expect a more balanced game than most seem to think it will be."
The 67-year-old added that he sees something in this Juve side that he has seen somewhere before.
"This Juve is growing similarly to my side back in the 1990s, first in Italy and then in Europe. Perhaps before long they will find themselves winning the Club World Cup just as we won the Intercontinental Cup in 1996. I would be delighted if Allegri were to win the trophy. I am not envious as they are all feelings I experienced and they are intoxicating."
And Lippi agrees that Juve have shown a flexibility in their Champions League campaign which bodes well ahead of the final.
"I have no doubt about it, just look at the things we've seen from this side. In Dortmund, for example, Juventus really took the initiative, showing superiority and a real awareness of their potential. Then against Madrid they got on top in the home leg, and while they were forced to suffer a little in the return that is normal for any side at the Bernabeu. They could even have won that game when you consider some of the chances they created.
"After three league titles, Allegri has come in and really added something. He has removed any anxieties from the squad and they have grown tactically. They now play in two different shapes without any transitional issues. This I how huge teams function.
"Luis Enrique has had a similar impact at Barcelona, and has got the best out of Suarez, Neymar and Messi while at the same time they recognise that he is the leader. We all know how the Blaugrana play, the way they use the ball so well and are hard to break down, but they have never faced a team like Juventus, who are so willing to defend so Messi and company will find it difficult
"Juve, though, must believe in themselves and take advantage of Barca's weaknesses. They must not be in awe of the opposition, and remember that all of the pressure is on Barcelona. I expect Juve to be tactically astute, and in 90 minutes anything can happen."
The former Napoli and Inter boss, who had two separate spells in charge of both Juve and the Italian national side, insists there is no set way to prepare for a final.
"Everyone has their own way to prepare for such an event. The important thing is to be focused on the goal, on the field. In a final you have to expect that there will be slight deviations to the general rules, but the only important thing is the result."
