More like improvement. While based on the 336, the Braztech redesign to the extractor mechanism is vastly mechanically superior to the old 336 extraction set-up.
Why does it look like that guy is shooting a 375 ruger? Is he 4 foot tall and weigh less than 100 lbs? For over $700 retail it needs to be finely blued and everything on it needs to be spectacular quality. The checkering needs to be sharp, the walnut needs to be top quality stock grade, it needs to be MOA accurate, it needs excellent sights, it should have no cheek slap, the loading and function should be smooth as silk. Anything less than that and you're buying a pawnshop special...