moto G4+ XT1644 diff's between two stock roms

OK.

I am downloading the stock firmware my phone.
Can someone (smarter then me) tell me the difference between:

ATHENE_6.0.1_MPJ24.139-13.1_cid50_subsidy-DEFAULT_CFC.xml.zip dated
1GB Jul 14, 2016 | 05:25AM

and

ATHENE_MPJ24.139-48_cid50_subsidy-DEFAULT_CFC.xml.zip

1GB Jun 24, 2016 | 12:43AM

and (ugh)

ATHENE_MPJ24.139-49_cid50_subsidy-DEFAULT_CFC.xml.zip

1GB Jul 16, 2016 | 03:17AM

(these were all downloaded here
Mine was gotten from Amazon (non-Ads, but only one SIM), and is the earliest (dated june 24th) per my current untouched phone's status screen.

I'd love to UNDERSTAND the difference, so that I (and OTHERS) can become SMARTER on the subject)!
TIA!!

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