I highly doubt Sprint keeps both the M8 and the M8-HK edition on OTA at the same time same version.... Regular M8 most definitely will get OTAs before the HK one does. HK is running a different version right now, they will keep the two separate.
Regular M8 will get OTA before as it's more inline with the other global M8 than the HK is... HK will get to Sprint labs after regular ones will as it's the minority here and will have to have its own separate testing due to different files needed to support the HK implementation.
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