the gold dot is nothing but a standard plated bullet, heavy copper jacket plated onto a lead slug, that is then treated to a handful of complex shape and swage processes. The basic plated slugs that become speer total metal jacket bullets in some cases are sent to different machinery and become gold dots.
This was a brilliant process, IMO. the whole thing, from design to marketing, was world class business.
To your point, I am going to go on record here saying that your 80 cent blazers and the $2 gold dots are 99.99% certain to have identical bullets. If they are both from similar production dates, they are almost certain to be the same production lot of bullets. The velocities will be almost identical. You will be shooting ammunition that for all practical purposes will function on target identically.
Bullets intended for magnum loads would have been made with harder cores, and the jackets would be plated to heavier thicknesses. These bullets are made by electroplating; precision slugs are formed and then plated, and when the precisely measured slugs are measured and found to be the proper size, the jacket has been plated on to the proper thickness.
Commercially, it would make absolutely no sense to make "good" and "bad" bullets to load in "gold dot" and "blazer" ammo. Speer works on a zero inventory principle. as runs of one caliber of ammo are planned, they run lots of bullets just for that purpose. They would, most likely, schedule several SKUs of .44 ammunition in a certain block of time. they would run hundreds of thousands if not millions of bullets, in all weights. A certain amount would be shunted off and packaged for sale. A certain amount would be shunted off for loading into aluminum, and a certain amount would be sorted out for brass. All identical. Different facilities would immediately start loading both brass and aluminum variants, and as soon as that stuff is taped into the cases, it is shipped to the distributors.
This is how cars and a lot of other consumer goods are made. A truck load of seats or fenders arrives at the dock, they are unloaded to the work floor, and that seat or fender leaves the factory within 24 hours, stuck in a brand new car.