In terms of the test sections, was there a substantial difference in one of them between your practices and the real deal? If you're scoring over 700 at home that's a huge discrepancy with what you're getting on the real GMAT.

Got a 640 on the GMAT. How are my chances at ESADE?

What does the rest of your profile look like? How much work experience do you have and what was your undergrad GPA, specifically?

Work experience: 3 years in a tech startup doing mainly marketing but I wear a lot of hats. Also 1 year of experience in a law firm on the operations side.
Undergraduate GPA: 3.5

I would say that with your level of experience and that GMAT score, ESADE is a reach for you. Are you exploring other options, or maybe considering re-taking the GMAT? A score of 700 would boost your chances.