Subspecies Identification

[Kerasa]

I'm trying to determine the subspecies of my Greek girl. Any help would be greatly appreciated!

 

[HermanniChris]

She's a Testudo graeca marokkensis.

 

[Kerasa]

Thank you so much!

 

[Tidgy's Dad]

She's a Testudo graeca marokkensis.

How can you tell, (apart from just experience, of course)
What are the physical differences between the marokkensis, soussensis ,and graeca subspecies? I live in Morocco and often can't tell them apart.
I would say this one looks like T.graeca graeca so would like to know how to tell them apart, if that is possible, please.