If you mean the difference between ASUS BW-16D1X-U and BW-16D1H-U PRO:
The stand, according to the specs on the ASUS site the additional included playback software (CyberLink PowerDVD 14, Power2Go 8 is supposed to be included with both), by the looks of it apparently a case and whatever that is supposed to be:
"Magic Cinema technology - Blu-ray 3D entertainment, 2D to 3D conversion and upscaling of DVD content".

https://www.asus.com/de...
https://www.asus.com/de...

If you really mean the BW-16D1H-U PRO, the only difference with this product would be the stand supplied with the PRO for vertical use.