Penrose twistors and LdGS electrons: Geometric compatibility and experimental tests

An oriented degree-one LdGS charge hedgehog and a twistor line carry isomorphic smooth tautological bundles. A nonzero-degree principal axis of a real symmetric tensor on an enclosing sphere forces minor-eigenvalue degeneracies. These exact geometric results do not identify an electron. The tested Dirac packet's Weyl-spin direction has degree zero, and the examined configuration spaces do not select fermionic exchange. A specified tensor-Maxwell hybrid supplies self-consistent radial charge profiles and restricted positive static second variations. Its conditional classical mass/radius bounds require a separate dictionary to quantum form factors. Physical equivalence still requires a global current, healthy dynamics, matched one- and two-photon response, and quantum statistics. Analytical derivations, explicit counterexamples and reproducible computational controls define the comparison.