there is a big difference between those two specifically. When I looked at the rugged razor data, there was about 1db difference between the 7.62 and 5.56 cans. Ive used the surefire 5.56 can on a mk18, so my opinion is in part based on experience shooting that setup. They didn’t have the saker 7.62 data for me to compare that. I could probably get a db meter and do it myself just for fun, although the gun would be different so it wouldn’t be a perfect comparison.Manufacturers info is meaningless. What does pew science or the silencer summit say?
For example
https://pewscience.com/sound-signature-reviews-free/sss-6-52-surefire-556rc2-mk18-556
vs
https://pewscience.com/sound-signature-reviews-free/sss-6-73-surefire-762rc2-mk18-556