the button paterns were never consistent.
I've seen stock drillings on a 1.5" grid and 1.625" grid.
There was also another layout where the gap between the punch row and the kick row were not the same distance as between the buttons. I think it was way wide like 1.75"
I personally prefer the tightest grouping, but it really depends on what your control panel has. They are not all the same.