Gladiator: Sword of Vengeance is a hack and slash developed by Acclaim for PlayStation 2, Xbox and PC. Early screenshots and footage show many differences, as noticed by Evan Hanley:
#The health bar and magic meter had a very different design.
#The health bar and magic meter are not visible for the tutorial in the final game.
#Invictus can wield all three weapons (sword, axe and arm blades) but he can only wield the arm blades in the final game.
#The select weapon text is different.
#The grab the rope text is different. The button to press to grab is different too.
#The camera work is different.
#A VC text flashes on screen very briefly.
#The arena you enter after using the rope has a completely different design.
#The music is very different.
#The music again is different.
The big and very noticeable differences are the Health and Magic Meter HUD is completely different and the Enemy Health Bars are basic.
Thanks to Evan for the contribution!