Well, I believe that battle is only used in a palnet sort of way where it has it's own website (battlegames.io) and is used to vote and as post rewards. Steemace has that too, but I think they are also doing giveaways with gg stakeholders. Steemace might also plan to use it as a currency for games and other things too iirc. Steemace also has a website where you can use there token to upvote/downvote too (https://www.steemace.io). The way you make a post gain those token rewards is by adding the tags battle and steemace just like with pal and others.