Powertrain / Under The Hood • Re: 2019 Differential Part Number

Question 2019 FF SEL 3.5l AWD
Differential Part Number?
Ford Dealer says replacement is:
# MU7Z-4000-G (CV6W-4B025)
It has a gear Ratio S-152-D

An alternate supplier on eBay says it’s:
# MU7Z-4000-H (CV6W-4B025-DF)
It has a gear Ratio S-150-D
Claim is new OEM part ?

Does anyone know what the ‘G’ vs ‘H’ denote at the end of the part # ???
Also is it ok to use a slightly different gear Ratio ? 150 vs 152 ?
Thanks!

---