Have you guys seen the NorthQ siberian tiger? It looks exactly the same as the H50... Not sure if it -is- the same though.
NorthQ also have a Siberian Tiger II which has a double fan rad.
The Siberian tiger is a rebadged Arstek LCLC, so is the Corsair H50, but the corsair is a revised design (Updated block, pump and RAD IIRK).
The Siberian tiger 2 does have a 120x2 RAD, but it still has the older inferior pump and water block (And an older RAD fin design). I'm not sure which would be better.