Pocketnow have posted this video comparing the features of the Navigon GPS Navigation app on the iPhone and also Windows Phone 7.
The biggest differentiator Pocketnow notes is that navigation continues when the screen is off, which tends to be a simple â€œRun under lock screenâ€ option on many apps on Windows Phone 7, and that directions continues during phone calls on the iPhone. They also note that due to in-app purchasing the iPhone app includes a store of maps, voices and other enhancements, which is missing on Windows Phone 7.
Of course a major differentiator is that on Windows Phone 7 there is the option to have a much larger screen, with the 3.5 inch screen on the iPhone looking pretty pokey in that video.
Read more at Pocketnow here.
Thanks Charles for the tip.