Difference between these 2 stock firmwares?

Hi all,

Other than the date released, what are the differences between these two official firmwares?

Base Firmware: I9300XXEMB1 (4.1.2)
Region: Europe
Country: United Kingdom
Carrier: Unbranded
Build Date: 1 February 2013
Modem: XXEMB1
CSC: OXAEMB1
Change List: 921399



Base Firmware: I9300XXELLA (4.1.2)
Region: Europe
Country: United Kingdom
Carrier: Unbranded
Build Date: 22 December 2012
Modem: XXELLA
CSC: OXAELLA
Change List: 742798

Many thanks