Difference between brands (1/6 dolls)?

[Arisa_]

I understand in the full size doll realm, there are many factors that contribute to price differences to make one doll more than another. But in the small 1/6 world … if it’s silicone with a metal skeleton … what else could contribute to why one brand is better than another? I’m just lookin say on Aliexpress and a Verycool body is about double what the Phicen/TBLeague is! How much better would that Verycool be? And then there’s LD which is even more expensive!