the difference between the standard sat nav and the upgraded one
The upgraded one is the Nav Pro. The main difference is the bigger screen and a DVD player.
Here are the specs for both
Standard:
6.5“ touchscreen colour display
2D/2.5D map navigation (Europe)
CD drive MP3/WMA
Music playback from MP3, WMA, AAC files with title display from SD and AUX IN
USB, AUX-IN, SD (2x) (Aux and USB require optional connection cable)
DAB, FM and AM radio reception
4x20 watt output (front and rear speakers)
Bluetooth connection for phone and media (HFP, A2DP *, AVRCP **)
Nav Pro 8.0" touchscreen colour display
3D map navigation (Europe) with voice control
DVD Audio/Video
Film playback from AVI, MPEG, Divx, H.246, and DVD from SD, USB and DVD data carriers
Music playback from MP3, WMA, AAC files with title display from SD and AUX IN
Gracenote database, podcast playback and jukebox
Internal 64GB memory as SSD (10GB can be used for music, etc.)
USB, AUX-IN, SD (2x)
DAB, FM and AM radio reception
4x20 watt output (front and rear speakers)
Bluetooth connection for phone and media (HFP, A2DP *, AVRCP **)