SF / Mars hydro source the same distribution lines ... all mainland China of course ... those “ knockoffs “ would more than likely BE FROM THE SAME production lines with custom logos. You know how China loves the counterfeit market ....Rolex , chanel , FILA , Nike , etc..... So just keep that in mind when sourcing vendors .... they even knock off the knock offs !
Kingbrite , Bava , Meiju are the a few of the popular ones. Archibald has the SF line , but could not tell you one way or the other About them. Hopefully it pans out ... because trying to get customer support from mainland China can be an issue with some vendors , and not even counting the cost of Re-ship back.
Keep us updated .... when your package comes , what’s inside and a little review.