Which Is Faster - Old School Remington 870 Or New Remington 870 DM?

In an amusing - and incredibly well edited video - photographer Yamil Sued compares which Remington shotgun is faster in sending 10 rounds down range - the 870 or the new box mag-fed 870 DM.




Obviously, the Remington 870 DM is quicker to reload for the average person. However, if you look at the video, the old school Remington 870 is quicker to get off the first five shots. I wonder what the difference would have been if Yamil had used one of those loading devices for use in 3-gun competition.