But aside from the addition of a wagon to the Polestar range and some subtle aesthetic changes, the bulk of refinements have been mechanical.
Driven largely by feedback from owners of the previous two iterations of the S60 Polestar (which were sold exclusively in Australia), the MY15 S60 Polestar and V60 Polestar gets a new wheel and tyre package, a recalibrated transmission, tweaked AWD settings as well as suspension and steering refinements.
The 20-inch alloys and Michelin Pilot Super Sport tyres are the tell-tale difference between the MY15 model and the MY14, with the latter being shod with 19-inch wheels and Bridgestone rubber.
With the Michelin tyres bringing more grip, Polestar's engineers had to retune the car's stability control and ABS software to take greater advantage of it.
Likewise the Haldex AWD system, which features a nominal 50:50 torque split but now adopts a more rearward bias when the stability control system is deactivated.
One thing that hasn't changed is the engine.
The Polestar's turbocharged 3.0 litre straight six produces 258kW and 500Nm, though for 2015 a new 2.5-inch stainless steel active exhaust system liberates a rortier engine note.
Criticism of the previous model's six-speed automatic has also led to a recalibration of the transmission, cutting shift times, introducing launch control and enabling the car to hold gears through corners in Sports Automatic mode.
With launch control the S60 Polestar will sprint to 100km/h in 4.9 seconds. The slightly heavier V60 Polestar takes 5.0 seconds.
The front brakes still comprise six-piston Brembo-sourced calipers and 371mm ventilated rotors, however the brake master cylinder and booster have been resized to generate greater stopping force and improve brake feel.
Ohlins is still the supplier of suspension hardware, with every Polestar being equipped with the company's DFV range of adjustable dampers.
With 20 levels of adjustment owners can customise the S60 and V60 Polestar's suspension to their own preference - albeit manually rather than electronically.
Thanks to 30kg of extra bulk over its rear axle, the V60 Polestar gets different suspension settings at the back, though it retains damper adjustability.
Cosmetically - and besides the larger wheels - the S60 receives a new bootlid spoiler. The V60 also sports a drag-reducing tailgate spoiler, though bodywork ahead of the B-pillar is identical to its sedan sibling.
Inside, the changes boil down to new Nubuck/leather upholstery on the seats and steering wheel, and a large slab of carbonfibre trim on the centre stack.
The S60 retains its space-robbing full size spare wheel, but gains a false floor to make the boot area less awkwardly-shaped. For proper load-lugging capability though, the lower, flatter floor of the V60 and its 692-litre luggage capacity wins.
Pricing (excludes on-roads)
Deliveries of the 2015 Volvo S60 Polestar and V60 Polestar will commence in January, with retail pricing as follows:
- Volvo S60 Polestar - $99,990
- Volvo V60 Polestar - $102,990
MORE: Volvo News & Reviews