[Eduard]

https://jst.de/product-family/show/164/eh

JST-EH has a 2.5 mm pitch, plus housing, plus orientation. I cannot see where that shall be any smaller than the omnipresent, universal Dupont connectors. Maybe you mean something different with "DuPont".

[numpad0]

Fake DuPont/QI/2550 has zero latching whatsoever. Contact lengths vary and housings come with massive plays. Great if you want a free safe breakaway feature, sucks otherwise. Nearly anything else has a latching feature that require a lot more force or deliberation to undo, like ZIF with a latch or a lock flap.

By the way, strictly for home breadboard uses only, when I need a bit more resistance than bare DuPont I wrap it in double sided tape and let the header poke through it. Kind of works.