Purely comparing the M9 to the issued BHP (both Cdn and Brit), having played and fired them all, the Hi-Power is far superior for the following:
Grip
Finish (the issued M9 look like they arem 50+ yrs, easy to scratch , cheap finish) while our BHP have been in service for 3x as long (I know, arsenal refurb, but still...)
Safe (the British MK3 safe is superior to the M9, our is inferior), due to location
Ammo, the M9 does not like +P ammo, BHP love the hot stuff
Only the sight on the M9 are superior
justmy 2 cents