As has been said. Drop it. Pointless discussion and full of hypotheticals that no one could predict.
Both coaches have their strengths and weaknesses. No one knows how Conte would do with this current Juventus missing the two best players of the COnte era, Vidal and Pirlo, and the best player of the last two seasons in Tevez. And no one knows how Allegri would have done with Conte's teams.
They're both obviously very good coaches, considering they have 5 Serie a Titles, a Coppa Italia, 4 supercoppas, and a CL final between them.