This assertion has, today, proven to be incorrect.
Just a few minutes prior to writing this correction article, I printed out enlarged copies of these TTO razors, extended the shave-plane and blade-angle lines, and measured them with a protractor.
|Examples of 8-1/2" x 11" photos of razor heads.|
As it turns out, yes, the Gillette blade angles are slightly larger than either the Merkur or the Lord. But not enough to make a difference -- especially when the Slim is set to its most mild setting. Embarrassingly, the Weishi blade angle is actually slightly smaller than those of the Lord or Merkur designs.
So my hypothesis about the inherent blade angle of TTO razors -- a proposition in which I was sooooo confident -- is WRONG!
Yet, if these razors do shave slightly more harshly as has been my experience, then why?
In these two razors the additional harshness may be due to a less-protected blade exposure combined with a relatively-larger blade gap, when measured along the shave plane (at least as compared to the Merkur; the Lord gap will take some additional analysis and explanation).
However, it's possible that my perception of the harshness of the TTO razors is not objective. I guess I'll have to pull them out of my closet and have some more shaves with them to see.