Strava and MapMyRun are both GPS-based web and mobile tracking services for runners and cyclists.
At a glance, they have similar homepages, designed to explain the concept and coax visitors to sign up.
The respective pages are similarly sized, with large imagery, simple text, top and bottom menus and the aim of quickly informing the user of the service proposition.
And yet, Strava is more effective. How does it do it?