Lee Custom Engineering and Lee Precision are the same company.
They consolidated product lines, spruce up the logo, and updated the company name to Lee Precision. But still on Highway U in Hartford WI, still the same company.
Before the dippers were yellow they were red. Before they were red they were black.
The powder chart varies because the capacity of each dipper changed each time they changed colors.
You'll get a kick out of the powder chart that came with the black dippers; many of the powder companies are long gone: Nobel, Alcan, Norma, DuPont.
In the 1960's they made the Lee Loader in 100 different calibers and gauges. I started reloading with their 16 ga., .30-30, 44 Mag, and .30-06 loaders.
Today they call it the Classic Lee Loader and in comes in only 20 calibers (no shotshell gauges). Keep an eye on the auction sites to find one.