Doge's palace
 

Hi
I am coming to venice in 11th of July! we are 2 adults and one 11 years old boy.
I've read all about Doge's Palace and still a bit confused!
I would like to see the public area and some of the best rooms of palace.
1-What is the main difference between "Hidden treasure tour" and "secret itineraries tour".
2-Which one do you recommend?
I must add that I am not interested in other museums in saint mark's square! and I just want to see the cathedral and go up the san mark's campanile.)
Thank you in advance