Optics: Basically a matter of taste - but am a little disappointed - simple elegance (expressed positive) - the BDT 500 I liked better.
Feel: lots of plastic ... well ...........
OSD: really completely revised - logical / structured and (therefore) easier to use.
Picture: can not tell the difference with the best intentions!
Sound: another significant increase to anyway good sound quality of the BDT 500 (in direct comparison)
Remote Control: The touchpad remote control 500 has sometimes driven me mad .... contrary to the announcements, it is fortunately a conventional illuminated become - fits comfortably in your hand and not too big !!
No drive noise!
First conclusion: improved technology - cheaper looking materials = higher selling price - Still: BUY