I like the Seasonic. "Based on" isn't a good enough reason for me to exchange one of the best PSU brands in the world for something that may or may not be of the same quality.
actually it has same design, same layout..
but "maybe" have different component.
sometimes other brand has higher quality of component than the oem..sometimes lower..based on order.
stick on your seasonic, because all of seasonic product has engineered very well, and seasonic engineer has make precision calculation with their component in order to ensure the psu quality.