Look at the casting quality - I'd say that those are chinese turbo's! Might be perfectly ok, might be made from casting sand... you pays your money and takes a chance!
Personally, I'd rather stick with a 2nd hand garrett or something 'branded' when it comes to turbo's. Don't get me wrong, chinese stuff has it's place, definitely, just don't know enough about their turbo's to make a decision...
Hugh