Though the Soviet Jupiter 11 is smaller, cheaper (probably) faster (f/4.0), *very probably* sharper (mine is very sharp), isn't especially prone to flare and has a wonderful "Zeisish" look to boot!
A good example of what Zeiss was up to already in the 1930's. Admittedly, as with all SU/FSU equipment, buying one is a bit of Russian roulette (pun intended), but basically I see no reason to go for the Hector.

Not everything Leica made was solid gold and especially earlier lenses tended to be far behind Zeiss.