What is the difference between phone and car-connected mode
Sygic Car Navigation is the world’s most installed offline navigation specially optimized to work with the car’s navigation screen and dashboard/steering-wheel buttons. The application runs on your Android device and seamlessly connects with dashboard systems available in cars from select manufacturers. Just connect the phone with a cable and you are ready to drive.
You can use Sygic Car navigation in your phone as well, as the app is also full-featured offline GPS navigation
Here you can see a comparison of the main navigation screen on the car dashboard and on your phone:
For more information about the available Car Connectivity options, check this article.