When uploading data from iGPSPORT cycling computers to strava website,

The data showed at strava website may have minor difference with the original data from iGPSPORT cyclimg computers.

And the phenomenon can't be entirely avoided, since the data will be processed and recalculated after uploaded to strava website.

• iGPSPORT cycling computer is calculating in real time, while strava website combines it with the background data to analyze.
• Strava only uses the basic information such as time, altitude and longitude, instead of the speed, distance, altitude that the cycling has recorded.

As for the accuracy,both have their own benefits.and you can choose one as a priority.