the 401t are a mild cam- basically, its going to shorten duration slightly, if not keeping it the same, and up the lift a few for better turbo air in/out functions
the 402t are still a moderate cam- very streetable. near-stock duration, much higher lift.
as for no dyno's, i think yo uare right with the boost setups being all different.
IMO, on a small turbo: 14g, t3 or smaller go with the 401t
on a med- to big turbo: t3/t4, t4+ , go with the 402t or something even bigger