Here's some info I found whilst trawling the net.
PZL W-3 SOKOL - GENERAL DESCRIPTION.
The PZL W-3 Sokól is a medium-light, twin engine, single main rotor, multipurpose helicopter. The helicopter has a fully articulated four blade main rotor and three blade tail rotor. All blades are of glassfibre-epoxy with an electrical de-icing system.
The main rotor and the vibration absorber are mounted on the main gearbox shaft. Two PZL - 10W gas turbine engines (take-off power = 2x900 hp) and the main gearbox are assembled as one unit and mounted on the fuselage. Both engines have separate drive inputs to the main gearbox which reduces engine speed and drives the main and tail rotors, cooler fan and hydraulic, electrical and pneumatic (wheel braking) systems' accessories.
Main and tail rotor control forces are augmented by a dual hydraulic system. The fixed tricycle landing gear incorporates the fully castoring nose gear and the main gear fitted out with disc brakes.
Two sliding doors provide easy entrance to and exit from the cabin. Luggage is stored in a compartment aft of the cabin and accessible from inside the cabin.
The PZL W-3 Sokól is designed for a wide range of applications.
Passenger version
The passenger cabin can accommodate up to 12 comfortable seats in a number of configurations.
Passenger/cargo version
The cabin can accommodate up to 10 passengers or up to 2100 kg of cargo.
Flying crane version
External cargo sling can carry loads of up to 2100 kg.
Medevac version
Can carry four casualties on stretchers and two medical attendants.
Mountain rescue version
Enables rescue operations high in the mountains - equipped with hoist of 270 kg lifting capacity, landing operation equipment, ski landing gear.
W-3/W-3A SOKOL is a far larger and more modern aircraft of Puma size.
Max all-up weight is 6400 kg and the engines are PZL10W developing 900 shp each at take-off rating and 1150 shp at 2,5 minute OEI rating.
Cabin capacity is far greater and this aircraft is suitable for most SAR, Casevac and public transport roles.
In addition the Sokol has a 2.1 tonne hook capacity which makes it suitable for aerial crane work and firefighting.