Quite a lot better.
It's not just the longer wheelbase that helps, but that the rear suspension arms are a lot shorter. They longer ones of the DB5 tend to flex a lot.
The real clincher though is that the DB6 brakes are a lot better. You do take your life in your hands with a DB5 sometimes.
And at higher speeds, the DB6 doesn't lift as much as the DB5 due to the better aerodynamics. Above 100mph the DB5 lifts quite alarmingly and the steering goes very light indeed.
It's not just the longer wheelbase that helps, but that the rear suspension arms are a lot shorter. They longer ones of the DB5 tend to flex a lot.
The real clincher though is that the DB6 brakes are a lot better. You do take your life in your hands with a DB5 sometimes.
And at higher speeds, the DB6 doesn't lift as much as the DB5 due to the better aerodynamics. Above 100mph the DB5 lifts quite alarmingly and the steering goes very light indeed.