Seasonic make great PSU'sand are the OEM for lots of other people like XFX and Corsair as these company's don't actually make PSU's themselves.
Unfortunately Seasonic only make 3 of Corsairs psu's these days. Most are CWT.
but was pointing out to the OP that seasonic actually make PSU's for a few other people that they will deffo have heard off 

PC Power and Cooling for the win. None of the Seasonic crap.
Seasonic are good and so are corsair,antec,xfx and nzxt hale series.corsairs psus used to be made by seasonic but they make their own now,
PC Power and Cooling for the win. None of the Seasonic crap.
Aren't PC P C now OCZ?

Corsair have never made their own PSU's. They use brands like CWT now as posted before.
My corsair 650tx went pop last night and tripped the plug sockets off causing my NAS to bugger up doing a update.. Just saying lol

Theres nothing between enermax and seasonic.
Both outstanding Ive had both