DNZ uses full size cap screws, (more surface area in the base recess,) Overall a more secure feeling than small head torx used by Leupold . (most $$$)
I don't know what you mean by "full size cap screws", but are you thinking that the fastener head surface area that engages the counterbore of the base? With aluminum or steel, I don't see this being an issue unless the thru hole is oversized or the base material is compromised.
And bigger diameter fasteners are not always "better" due to insufficient bolt stretch.
