The 826469-3: The dual-row layout with all positions loaded gives you six circuits in a compact footprint — typical for signal routing or low-power distribution on a PCB.
Compared to the 1318699-3, which is a 12-position, 4-row header on 0.165" (4.20mm) pitch with a circular contact shape and latch lock, the 826469-3 offers half the positions and a narrower pitch — better suited for dense signal routing rather than higher-current power distribution. The 953440-3 is a 6-position, 2-row header on the same 0.100" pitch but with tin mating finish, a friction lock, and a brown UL94 HB housing. The 826469-3's gold mating finish and latch holder give it an edge in applications requiring higher mating cycle life and more positive retention.