Another "what's the difference between"

The center registers are larger on the Ford wheels (if it's 15" magnum, it's DEFINITELY a Ford wheel).

The larger register upset the hubcentric feature making it somewhat easier to get the wheel mounted out-of-round if the lug holes aren't perfect. Otherwise I think the differences are strictly cosmetic.

This is NOT true. There is no register hole on Magnum 500/road wheels.

Magnum 500 is a name used by the wheel manufacturer/OEM supplier to Chrysler- Motor Wheel. They were offered with this name in the aftermarket.

I have 14x7 and 15x7 ford "Magnums" and they work just fine on all my cars including the 14" on 5th Ave slider disks.

The centers are in fact the same between the Motor Wheel version, the Chrysler version and SOME fomoco versions, although there is a fomoco version that is much shallower (and much cheaper) that will NOT clear the front hub bearing on Mopars. The only difference on the taller center is the sticker.

The info about chrome outer rims is correct, Mopar offered chrome until 1968 IIRC, then switched to a trim ring.

I believe it is also correct that Mopar never offered a 15 in chrome (and possibly not at all).

On the 14x6, the only diff between all three is the pentastar logo or lack therof.