I do not have All-Clad, save for a roasting pan that came with my oven, and the only Mauviel that I have is the copper version, and very old. However, even though I do not cook with the pans in your query, I do have a suggestion. Place something approximately as heavy as the contents of your pans will be while you are cooking, and try the movements that you will make while cooking. Compare the comfort of the handles and the feel of the pans. I find the way a pan feels can add or detract significantly from cooking pleasure. Perhaps you have already experimented?
PS
I once had a non-stick roasting pan from All-Clad. The coating peeled after a use or two. I sent it to All-Clad, at my expense, for an evaluation of whether it could be replaced per their warranty. Their response was that the defect was caused by using heat that was too high, i.e. over 350. My response was that roasting temperatures are, by definition, high. However, they did not replace the pan. I am not a big fan of All-Clad, but I know that many people love them.

Although I sell Mauviel and really think it's great stuff I tell customers on the fence to buy one pan from both makers in question and see for yourself. There are differences in all brands and I don't believe in the one maker fits all philosophy. Your strength and cooking demands will help you decide which brand is best for you.
good luck
Gary.F