Corsair relies on buyers actually hearing of products to make sales, brand recognition. The CX line of psus has been around for Years! But they have made changes. The most prevalent sales for a long while used green/white bubble type lettering on the side of the psu. Many shops are buying up the old stock and selling those old units, brand new, to unsuspecting ppl who have heard of corsair, so it must be good.
The new version CX is considerably different platform, different everything except the name. Much better quality build, outputs, voltage regulation, protections. The new version has a gray/silver ish stripe and black lettering, as do all the new model Corsair.