Could someone please tell me the difference between these car mounts?

[Cheaptoad]

Other then their slight design differences I can not tell one from the others.




Arkon SM679 Universal Smartphone and Midsize Tablet Windshield Dashboard Car Mount fits All Apple iPhone and Android Smartphones

Arkon SM614 Universal Smartphone and Midsize Tablet Windshield Dashboard Car Mount fits All Apple iPhone and Android Smartphones

Arkon SM668 Sticky Suction Windshield Dashboard Smartphone Mount for Galaxy S5, S4, Apple iPhone 6 5 iPad mini and Midsize Tablets

 

[Cheaptoad]

I think I got it. They articulate differently and have different rubber suction pads