That's only an incremental advantage. Note that SpaceX also has an equatorial launch site but they haven't used it since the Falcon 1 because it's just not as practical as operating out of Florida/California.
Comparatively, SpaceX is operating a much simpler rocket that is manufactured much less expensively than the Ariane 5, by about a factor of 10 or so.
Comparatively, SpaceX is operating a much simpler rocket that is manufactured much less expensively than the Ariane 5, by about a factor of 10 or so.