Both are capable of handling high quality editing. Window has Adobe Premiere Pro and Mac has Final Cut Pro or Pro X. As the matter of fact, it is the hardware that affects the work flow. The CPU, RAM, graphic card, storage read/write speed also the monitor and sound card if you are very particular about hight quality outputs. It all adds into calculations. The problem is, how much budget are you willing to spend on such technologies? My opinion is to use a system that you are familiar with, and upgrade the hardware according to your preference within your budget.