IGuidance is equivalent to TomTom, for what I want/need. I use the two programs interchangeably depending on which device I need (phone calls versus an internet connection. I carry both the 650 and the 6700 with me. The 650 is much, much better in bright daylight.
If you really want the details - go here:
http://www.gpspassion.com/forumsen/t...65&whichpage=1