Yeees the Zeiss genes

44-2 and 44-3 are with 8 bladed diaphragm so they are more interesting, the others are with 6 blades and are bigger and made with less care. In the late models like 44-6 and 44-7 there is improvement in the lenses and they must be more sharper wide open, but ... it is made in Russia - nothing is guaranteed. I would go for the 44-2 or 44-3 because of the size and 8 blades. I have one 44-2 in very bulky condition for spacial occasions when I want to test something or just play. The character is very similar to my Pancolar 50 1.8 MC so the helios stays at home most of the time maybe because it costs nothing and there is no point of selling it.
PS most of the problem copies of the lens are not bad from the factory but because of afterfactory repairs

so try and buy is best!