The quality of the prints has nothing to do with the method of data transfer you chose to print your images. Try for yourself first and decide what method you prefer based on the limitations of your equipment.
WiFi connection could drop. If your printer is not made to receive the file before printing it, a drop in the WiFi connection could result in your print being interrupted without being able to resume.
I agree that a poll for this is odd and you need to decide based upon your equipment.