This is a boost curve for K27 7200 vs. "standard" K27. It sits on otherwise stock 3.3L CIS engine (off a 964 3.3T):
And yeah, If you plan to make a scientific model of spool behaviour by collecting other people data, you might find that your results differ. There are just too many variables. It's not only turbo sizing vs. engine volume, it's also ignition timing, header geometry, shaft inertia, plenum geometry etc etc.