Microsoft released a low-cost Xbox 360 S, shipped with less internal storage space, as well as a high-end Xbox 360 E, shipped with more storage space and the Kinect sensor. Sony released two different Slim models of the PlayStation 3 that reduced the system size and subsequent retail price which helped improve sales. Ultimately, the Xbox 360 sold an estimated 84 million units, based on industry estimates as Microsoft stopped reported its sales,[50] while the PlayStation 3 sold 87 million units;[51] the Wii comparatively sold over 101 million units.[52]