If the distance between the rear axle of the tow vehicle and the ball are the same it doesn't matter what kind of truck or vehicle, both will have the same amount of weight removed from the front axle given the same tongue weight. This does not mean that all trucks will react the same though.
Some, such as 1/2 ton, with soft suspension, will squat a lot in the rear and with less percentage of weight on the front because of possibly smaller engine, frame, tires, brakes, wheels, or whatever, the added weight to the rear will cause more handling/steering/braking problems and the front measurements may rise a lot.
A 1 ton, or possibly a dump truck or similar, will not squat as much or have much more percentage of weight in front of the rear axle compared to the 1/2 ton, so the effect on the truck will be different and may require less correction. You may very well not see any rise on the front bumper measurements on a 1 ton or dump truck although the same amount of weight has been removed and the effects might be nil. I think the key word is "percentage".
Both trucks, if weighed on a scale, will show the exact same amount of weight removed from the front axle though. It is just percentage and the effects of that weight that must be dealt with and the amount of correction may or may not be the same.
As far as number of links required, there are many variable to be considered. How strong are the bars? How stiff is the receiver? What size is the A frame of the trailer? How much tilt is on the hitch head, etc. etc. etc.
Hope this helps a bit.:)
Barney