Asus Zenfone 3 Deluxe ZS570KL motherboards

[GeMiCo]

Please tell us some basic information before asking for help:
Model Name:Asus Zenfone 3 Deluxe ZS570KL
Firmware Version:Android 8.0
Rooted or not:Not rooted
Frequency of Occurrence:phone is dead
APP Name & APP Version (If your issue relates to the app):
Hello,
Who can tell me what is the difference between these motherboards:
Asus 90AZ0160-R00040 ZS570KL MB._6G / MSM8996 (2.15G) (64G / D / WW / S1 /)
Asus 90AZ0160-R00011 ZS570KL MB._6G / MSM8996 (2.15G) (64G / D / WW / S2 /)
Asus 90AZ0160-R00010 ZS570KL MB._6G / MSM8996 (2.15G) (64G / D / WW / S2 /) 
What is the difference between S1 and S2 and also R00040, R00011 and R00010?
Thank you!

[RAJU_MSC_MATHEM]

WW means global firmware. But in some firmware contains different simcard frequencies..
In S1 and S2 does not same frequency, because the each and every country uses their own frequencies