Demetrius and the Gladiators (1954)

Demetrius and the Gladiators is the only slightly better sequel to The Robe.  It has a similar plot to Spartacus.  It's almost impossible to talk about historical accuracy in this movie, because nothing in it is accurate.  It's better to just accept this takes place in an alternate universe.  That being said, it was kind of fun to watch as the fight scenes were pretty good.