The Ford Fusion/Milan/MKZ ( the chassis is 12.7 % stiffer than the Mazda6) AWD ( hardware supplied by Dana Auto) comes with front and rear ABS/Traction Control braking differentials ( up to 62.5 mph) and capable of sending up to 100% of engine power to the rear axle. Most of the power goes to the rear axle on hard straightaway acceleration and/or cornering/turn accelerations regardless of traction until traction is lost ( One professional reviewer clocked identical 0-62.5 mph time and 1/4 mile speed against the Fusion FWD). The curb weight of the AWD V6 model is about 3577 lbs, about 200 lbs more than the FWD V6 model. The AdvanceTrac electronic stability control will be available as an option in the U.S for the 2009 CD3-2 platform based Fusion( maybe standard in Canada). Note that Ford may tune the 2009 Fusion AWD for better gas mileage which may effect how the AWD drives compare to the 07/08 AWD models. According to the NHTSA's "Static Stability Factor (SSF) which determines how top-heavy a vehicle is" the 2007/08/09 Ford Fusion/Milan/MKZ AWD is less top-heavy than any of the 2008/9 models listed below.
Acura TSX/TL/RL 4-DR, Audi S/A 4 (fwd/awd)4-DR, BMW 3/5 Series( i/xi) 4-DR, Cadillac CTS/STS/DTS ( fwd/awd) 4-DR , Infiniti G35/G37(fwd/awd) , Jaguar X-Type 4-DR, Lexus IS250/350(fwd/awd) 4-DR , MINI Cooper S , Mazda6 4/5-DR, Mercedes-Benz E-Class(fwd/awd) 4-DR, Saab 9-3(fwd/awd) 4-DR, Subaru Legacy/ Impreza 4-DR, Volkswagen Passat(fwd/awd) 4-DR, Volvo S60/S40(fwd/awd) 4-DR, Honda Accord 4/2-DR, Nissan Altima 2/4-DR