The Blu-ray release of the final Spartacus season contains Extended Cuts as well, this time actually for every single episode even though there are less differences than there were in the previous seasons. Besides more plot, there's more sex, more violence, more dialog and also alternate scenes. There's any possible difference in it.

The Extended Version of Episode 3.10 contains 3 more scenes with a total difference of 86 seconds.

7:48
After Sibyl and Gannicus had sex one last time before the battle, they also discuss what will be when the battle is over. They either came back together or Gannicus dies and he spends his after-life with old fallen friends waiting for Sibyl. Then she gives him a good luck charm.
Furthermore, the TV Version contains an alternate transition 3 sec
51.5 sec

9:27
Crassus asks Kore how his son had died one more time. She explains he got stabbed by one of the slaves. Close to tears, she keeps it a secret that she's the one who did it.
21 sec

11:55
Saxa is making out with some woman who tells her not to get killed on the battle field by a Roman. Sibyl says goodbye to Gannicus. Both Gannicus ans Saxa obviously handle the seperation very well.
16.5 sec