Since the Maharal (born 1512) lived around the same time as the Arizal (born 1534), and it doesn't seem like they had any acquaintances.
Which sources did the Maharal utilize when learning Kabala?
What is the difference between his and the Arizal's Kabala?
What was the general philosophy of the Maharal's study of Kabala?
I am no expert in the Maharal's book. Even though I have studied them, I don't seem to understand any of his philosophies from them.