It looks as though this could be due to Sprint working closely with Samsung on this particular release. Samsung Galaxy Note Edge units that were sold either unlocked or purchased from other carriers will, theoretically speaking, also be on the receiving end of this operating system update in due time. Sprint’s version has seen the Over The Air (OTA) rollout happen today.
As usual, this is but a staged delivery system, so be patient if your Sprint-powered device has yet to pick up this update. Upon applying it, the software version on your device should hit N915PVPU4COFE, as it comes with accompanying bug fixes and enhancements as well. [Sprint Support Documents]