Logically, mathematically, if same length spokes and travel same distance from rim to hub then cannot suddenly grow 5mm. The extra protrusion can only be the result of different lacing. I suspect to do with the "twisting" of the hub to gain tension during the build.
A few years since I have built complete wheels so I may be wrong! But the logic surely can't be.
A few years since I have built complete wheels so I may be wrong! But the logic surely can't be.