It's a pity that the factory power and torque graphs don't go below 1000rpm but at that speed the 3.0i is making 230Nm while the 35d is making 340Nm, as mentioned above. If the 3.0i does have an off-idle torque advantage it must be very fleeting at best. Of course, in the poster's case, there's a also weight and gearbox difference to take into account.