I recently got a IPhone and started using the Strava app. I have been using a Garmin 500. I have used every setting on the Garmin during my commutes. It does not seem to matter which one I use, I basically come up with the same distance. I ran both on the same commute home the other day. I got 5/10th of a mile more distance on the IPhone (strava) then on the Garmin. I know that does not sound like a lot. But my commute is fairly short, 15 miles. Since I am tracking mileage, over a year that adds up. I know this sounds anal. That is because I am anal when it comes to logging my rides.
So the question is, which do you think is more accurate? does anyone know the sampling rate on the IPhone? Should I go pound sand?