Dollars to donuts the only difference you'll hear is in your head, and of the hole being torn in your wallet. The AVR-3313 is a great unit (I've got one myself) but the DLHD stuff is just marketing clap-trap, in my opinion. Basically DLHD is just a timing signal so that the transmission/reception clocks are synchronized between the player and the AVR thus preventing "clock skew" or jitter. In real terms, this is pretty much meaningless since the on-wire HDMI protocol is designed to make clock recovery simple and reliable. If I were you, I'd save my money and buy a nice midrange BDP player with decent build quality and software performance.