Somali and Puntland 1,000 Shillings banknote

Hi!
I have always had difficulties to distinguish the Somali 1,000 Shillings banknote from the one of Puntland.
I thought I knew, but then I raelised I still don't.

I will attach my banknotes below, and hopefully someone can help me out here. One of the notes is different from the two above - which seems to be identical with each other.

Here's my two notes:


Reverse:


Discovered differencies:
C 444
Purple "1000"
Large/Wide serial number
Normal printed strip and denomination

D 120
Green "1000"
Small/Narrow serial number
Silver strip and denomination

Watermark:
C 444
Very weak

D 120
Normal, strong

Any ideas?

No ideas of how do distinguish the two?