A few other reviews came to a different conclusion. The main difference is that it just has a higher factory overclock.
Other reviews differ on yours regarding the cooler: http://news.firingsquad.com/hardware/sapphire_radeon_5850_toxic_review/page11.asp is one.
FYI the Toxic card uses a Vapor-X cooler. Your article didn't point this out but current information from Sapphire states this to be true.
http://www.sapphiretech.com/presentation/product/?psn=000101&pid=321
