Anything is possible, especially if there's any crossbreeding in the wild between those two subspecies. I know that the Hermann's tortoise lacks thigh spurs except for one particular locale that does have them. Chris works a lot with Greeks so I know he can provide more insight.
I also have some photos of soussensis on my website. I have a trio of hatchlings I bought from Chris and he sent me a few pictures of one of the parents.
https://sweetgreektorts.com/soussensis
Males have a much longer tail and a slit opening. Females have a short tail and a puckered opening. See these pics of mine for examples. More info on my website too... https://sweetgreektorts.com/breeding-testudo-graeca
No bullying that I have noticed. Some are more shy than others and all have their favorite hiding place, which there are plenty available to them. They are certainly an awesome species, very different from the many Greeks that I have. I'm working on their permanent outdoor enclosure which will...
Check with Andy at Arizona Tortoise Compound. I got a group of hatchlings from him last fall that I am currently raising to breed when they reach maturity.
If you haven't tried the Kapidolo Farms "Gel Kits," then I highly recommend you do! Each pack makes a large portion that you can refrigerate or freeze for later, and you can customize what you want in the kit. I've added this to the breakfast menu once a week and all my torts love it!
Also easy...
I've purchased just about everything from the Kapidolo Farms menu, including a handful of those "gel kits." My torts love it all, and I'm mixing a variety of the dried items into their food a few times a week.
I also use the calcium carbonate powder to make my own calcium blocks.
Will even...
They can last a couple weeks on their yolk sac reserves. Keep offering food and make sure the temperature and humidity levels are good. How is its activity? Eyes open and moving around?