I am going to start english courses soon. I will be in the FCE class but I will not pass the exam. As the teacher said to me that FCE course is a bit higher than Upper intermediaire course.

FCE class will work on : FC Masterclass Oxford book
Upper intermediate class will work on : Cutting Edge upper-int 3th edition

I am still hesitating. Which book has the higher level?
I would like to improve my level as much as possible (vocabulary, speaking,...).

Thank you for your help