Hmmm it looks like both guys have a SEAT type AN6510 chute's rather than AN6513 CHEST chute and harness.
The rip cord handle is clearly visible on this screen in my opinion...
Hey Jerry, good eye! Seems to me nothing was a hard and fast rule back in the day. Use what you have or use what you like seems to be more to the point. I have looked at many 8th AAF photo's of B-17's in the very early days of the war. It's clear field modifications of the aircraft was common and things were by trial and error. It's also clear the guys were looking for better ways to do everything and they used everything to up the odds in their favor. Field expedience seems to have been the rule.