Stop in for a cup of coffee

They make drums in all those materials but up until now they've only been for your bench grinder, and it's hard to put a unibody car on the bench grinder. They make all those materials in discs for your Makita, whatever, and wheels for your drill. Carlisle was loaded with 'em.

WALTER SURFACE TECHNOLOGIES Blendex 4.5 in. x 2 in. x 5/8 in.-11 in. GR Medium Surface Conditioning Drums-07M423 - The Home Depot

WALTER SURFACE TECHNOLOGIES 2-in-1 4.5 in. x 2 in. x 5/8 in.-11 in. GR60 Turbo Drum-07K421 - The Home Depot

We still have a Sears.
I think the big difference is how the Eastwood tool supports it with a shaft through instead of a thread on end. That and the handle setup should give much better control, so your using the whole surface. Contrary to its name‘Contour’ - Looks like it’s niche would be cleaning relatively flat panels. Having the same grits on other tools would be handy for other tighter areas.