Except for the fact that is baseless and ridiculous. Pushups and Handstand pushups use different muscle groups. Me being capable of doing handstand pushups does not translate in any way to me pushing more on a bench press.
Aside from the fact that you only read half of my comment, the bench-press and handstand push ups don't completely overlap, but some of the same muscles are used for both of them.
Am I wrong or do these two exercises seem to target the same muscle groups?
Also, the muscle groups targeted by both exercises depends largely on hand placement. The same would apply for hand-stand push-ups, just to a lesser degree.