Raspberry pi 3 b or zero w

Hello my name is Raymond.
I have a Anet A6 3d printer and like to use astroprint for slicing printing from my Android phone.
Wat raspberry is the better one?
Do I need the processor power and more memory from the 3 or is the cheaper zero w enough?

We only test and support the RPi3. Some users have used the Zero successfully though. If you’d like to be on the safe side, use a 3