They may be the same manufacture, but VR ARE different. Hold one side by side. Aside from different color. They have different, steam-holes, layers are different thickness, and one feels stiffer. Plus I've popped a few VR.
So a site error, and and Email address is enough not to use them? Lol
I mean, if you wanna get that picky, RCD has a picture of a 6.0 for their 6.4 section.
Not saying I would or wouldn’t use JK, but come on.