Differences between navigation: MMI Touch nav plus vs. MMI Radio + SD card nav
I read the brochure, seen the videos etc. but I'd like to hear the opinion first hand from people who tried both MMI Touch plus navigation on the new Audi A3 and have also used the SD-card based navigation with MMI Radio.
So far I only know that the SD-card navigation doesn't have the 3D view of cities and mountains, that the screen is smaller and lower resolution, but I'd also like to know what other differences in speed, features and comfort there are. Thanks! :-)