Roadmate 1470 vs Maestro 4700


I am looking at both the 4700 & 1470 units, my questions are: 1. is the 4700 worth the extra $45 or so, given that I am not interested in blue tooth and 2. is the technology engine the same for both of them ? I am looking for reliability and a minimum number of quirks.
THanks, Tim

same navigation engines

I tested both models and concluded that their navigation engines are revisions of the same software including all positive and negative aspects.
As to reliability, it is too early to speak about their reliability; Magellan has not finished yet fixing bugs. For example, the latest software update for 1470 was released just 2 days ago.