Calling this a test is an exaggeration at best. Without stating and assuring equal initial conditions and so on this tells us nothing.
Same device can differ up to minutest time difference depending on last time gps lock has been acquired, difference from last known position and so on.
http://dailymobile.se/2009/10/14/gps...vs-nokia-5800/
I don't think this is a duplicate post, but sorry if it is.
Jon
...caught in the act of being myself.