If your phone is connected via USB, then yes, you can use voice commands to play specific artists, albums, songs, genres, etc. from your phone's local music library. If it is connected via Bluetooth, then voice commands for audio are limited to playback control like "Play", "Pause", and "Next"...
I agree with this 100%. I ordered the 2015 with MFT but only because it was included with the package I wanted (also the base interior doesn't look that great). I actually like the first generation of SYNC - the one with the 2 line LED display. It was very readable during the day and at night...