Isn't the brand Siglent available itself on the Russian market?
If so, what's the point of buying an OEM branded Siglent instead of a genuine Siglent?
The only thing which I can come up with is price.
But I don't expect because of looks and design, as typically the OEM branded versions have ugly colors.
I guess it's the same with the UnionTest
My suggestion is to always go for the original manufacturer. Better warranty process. Better support. Better looks