In my experience there is practically no disadvantage to a longer blade (other than perhaps legal restrictions and larger carry / closed package), but many advantages. So I´d go for the Endura.
That said: The thinner stock of the Delica is a point for that model imho.
But that´s what you said and probably know even better than I do anyway
and I don´t have any of the "unconventional reasons" you asked for for the one or the other
Top three going by pocket-time: Endura 4 in VG 10/Micarta-scales; Stretch 1 in VG 10; Endura 4 in HAP 40