The 332 had a longer fuselage (1 metre?) ahead of the mast and to compensate for the reduced stability in yaw this gave, the lower tail fairing was fitted. There is a strong yaw / roll coupling / possible divergence problem even on the type 330 so this had to be carefully considered - it got even worse when the original open engine intakes were covered by the "PIP" intakes, putting more aerodynamic area above and ahead of the relevant roll / yaw axes. Those yaw /roll divergence demos we had to give always had the possibility of becoming a "bum clencher".
The earlier military 330s (RAF ones) had a Turmo 111C-4 rather than the 4C, I recall it was only about 1320 shp (sure someone with more recent experience can correct me if needed). How we used to love explaining about the function of the delta-P valve to students on the OCU course and how "balls out" really did mean that, due to the simple centrifugal mechanical governor...
The stuctural materials were / are mainly metal despite the jibes we got about the "Plastic Pig". Nose bay panel and the big MGB "dog kennel" cowling were composite apart from a few prototypes in metal. The main rotor blades were metal sparred too, later upgraded to composite fibre and what a transformation they gave!