What next? See who can pee the farthest?
While knowing SAC rate is useful and comparing it over time helps track imrpovement for newer divers, comparing it person to person is a totally useless endeavor.
After acheiving all possible efficiencies in breathing technique, SAC rates will still vary greatly person to person, based on size, weight, metabolism, dive style and regional differences in dive conditions.
Who has the lowest SAC rate? Some 110 pound, even tempered, type B personality woman, who drift dives in mild current in the tropics.
Don't judge this by the tone, it's just that I don't get it. I think SAC rate is another one of those things not worth bragging about or comparing.
BTW- betcha mine's lower than yours