Jethrow,
The only one out of those 3 masts that is flex-top is the NP.
The P7 masts are fairly constant-curve, leaning towards hard-top and the MS are full hard-top masts.
This is an ok chart of mast bends to compare -
www.unifiber.net/masts-selector (but I think it's done on slalom sized masts not the big ones, but generally the brands' masts will be close to this chart in FW sizes).