Official comment
If your beat grids are set properly, pressing the SYNC button will snap them together. Now I know what you're going to say "I don't want to use the sync! How dare you suggest that I use a tool designed to make my life easier!" but hear me out... You're using software, it shows the BPM, and chances are you're not matching by ear. Rather than spending the time to try and match numbers onscreen, why not press the one button that will do it for you, and pretty much guarantee that the songs will be beatmatched instantly, regardless of the resolution of the pitch fader or the accuracy of your movement of the slider.