There's a posting somewhere on this site that shows cross-sections of all the most common HI models, so you can see the angles of the edges. It's an older posting so I'm not sure how to find it, but maybe someone else can let us know.
As you might expect, heavy chopper models like the Ang Khola have more obtuse angles, compared with lighter models like the Kobra The WWII model is more multi-purpose than the AK, but still pretty robust. Regardless of the edge angle, all of these blades can be made pretty sharp. Personally, I don't like the concept of "shaving sharp," because that's contrary to the designed purpose of these knives. A khukuri does not make a good razor, a razor does not make a good khukuri. I do like an edge that can make a smooth cut in an ordinary sheet of paper, and I think that every HI model can be sharpened to that degree without much effort.
There's no single answer to "how sharp is a WWII model" because they often come very sharp, but sometimes not so sharp. These knives are made by hand using traditional tools and techniques. It's not like products that are churned out on CNC machines and are all identical.
A word of caution about sharpening devices. You should not use a device that puts a secondary bevel on the edge. This changes the edge geometry and can reduce the chopping ability of a convex-edged HI blade.