Up until the week ending June 15 the PlayStation 4 currently leads in the total number of pre-orders with about 75,000. The Xbox One is lagging behind with 45,000 pre-orders. However, with Microsoft doing a reversal on its DRM and used game policies the numbers could change.
i thought the pre-orders would be higher for both of them. maybe because it was just announced. by the time Sept comes around the pre-orders would be around the 300k-400k mark for both. its gonna be a close one !
There will probably be a point later on during their system lives where the Xbox will meet or exceed the PS4. Especially if they continue to improve the system.