Right-angle mounting and latch retention
The contact mating length is 0.230" (5.84mm), and the post length is 0.130" (3.30mm) — enough for standard through-hole solder joints on a typical 1.6mm PCB.
The key difference: 1394090-1 uses a 0.112" (2.85mm) pitch and carries 6 positions with tin mating finish — so it's a wider pitch, fewer circuits, and lower mating-cycle life. For a 2.54mm pitch, 11-position, gold-plated requirement, 6-103635-0 is the correct match.
