Default difference between KSA & UAE 4.4.2 rom of S4 Octa

what's the difference between
PDA: I9500XXUFNB4 CSC: I9500OJVFNB2 MODEM: I9500XXUFNA6
the official software of S4 Octa for KSA and
PDA: I9500XXUFNB4 CSC: I9500OJVFNC1 MODEM: I9500XXUFNC1
the official software of S4 Octa for UAE ??
My S4 Octa 3G GT-i9500 is originally KSA region but since i live in Egypt I'll as usual flash the new soft manually with Odin, So I notice that there is a difference which wasn't available b4 in 4.3 software update "where KSA & UAE of S4 Octa was identical" now there is a difference in "CSC & Modem" between KSA & UAE where i can find that the UAE is seems to be most advanced or latest than the KSA rom, So what will be ur advice ??