We don't have DSM's, you are in the land of StarQuests with a slightly different nomenclature.
When it comes to us, a "16g" is "small", and a "s16g" is "super" or "big".. If someone is talking about an Evo variant 16g, they'll say exactly that.
You must not be paying attention to your "DSM tuners".
Some places refer to the big 16g as a "super 16g" or have different versions altogether. From WRX's(Deadbolt), to DSM's(HAHN Racecraft, FP etc...), to turbo hyabusas.
Different companies refer to it's flow as anywhere from 550-585cfm.
Like the FP small 16g(510cfm), big 16g(550cfm) and Evo III 16g(575cfm)..
Or DB's small 16g(520cfm), big 16g(525cfm), and super 16g(585cfm)..
The EVO III 16g compressor map used to be hosted here years ago. http://linux.forcedperformance.net/merchan.../evo_ti_map.jpg
The link is dead though.
However....
http://turbocarz.com/shapegsx/16g/compressor_plot.gif
Taken from a 4 year old DSMtuners thread.