Well, I sure can be dense at times! You are absolutely correct. 95% of the time, I use my SP6 at home with the Surface Dock and I totally forgot that the regular charger doesn't have a USB connection. Doh.How would you even use it with the surface pro 6? The surface pro doesn't charge via USB. Do you have a link to the charger in question?
Either way, I can't imagine that it would charge any faster than using the standard brick, that thing is fast!