Well, all the Win & WW ones I have from back when are nickle plated and thinner down near the flash hole then other cases of the same age.
The HBWC set deeper in a case then a regular bullet, and a tapered web would squeeze the HBWC skirt when seated full depth.
I actually don't know if there is any differance in them today as HBWC is not the big deal it was in 1960's Bullseye shooting competation.
rc