Its understandable that with a lot more datapoints, the speed is measured better but in some corners the difference is 15km/h!
So, for every one who is willing to buy a GPS like this, keep in mind that you cant compare your old lap data with the new ones!
As I look at the speeds on my last recordings and graphs, I should be at least 10 seconds slower but instead of that, I went 0,8sec faster!
Still I love my new Dual GPS
![Wink ;)](./images/smilies/icon_e_wink.gif)
http://www.youtube.com/watch?v=QiO82_Ll-8w