Which is great - if you can live with the silly grin
Having just had a quick look at the numbers - the Ford / Mazda wins out - once it has had a GVM upgrade - for my money. Simply looking at the difference between kerb weights and the remainder of the GCM once the 3500 for the trailer is removed, the Ford Mazda has the highest payload available over the Collie and Dmax by a few hundred kilo. The downside with the Ford/Mazda is by running at maximum weight it is the only one to get pushed over its allowable GVM at full weight allowance once you add the towball weight but the upgrade will sort that. Couple this with equal highest torque figures in the class but a torque delivery that comes in at less RPM (bigger cubes) gives it the go on my account. Like I said though, if you can get a ride in one with a load on I would because "it tows it well mate" means different things to different people