Side by side comparison can be accomplished in a number of ways. This screenshot shows the integrated dual video player, where two videos are presented in one window.

You may also launch multiple MotionPro! sessions at the same time, and load a different video into each one.
 

Each MotionPro! sequences its videos independently using this method.
 

An unlimited number of MotionPro! sessions may be opened at the same time.
 

If you have multiple monitors you can place a full screen view on each monitor!