I'd have to say MKA Blaze is a bit more badass. MK:DA Blaze was a very rushed character, obviously, as he didn't have any weapons or anything. They just basically took a character model, threw some fire on it, and gave it a couple of recycled fighting styles and special moves. I like how they made his story in MK:DA, linking it to the "Torch" character in MK2, but MKA's story was kinda lame. Even though Blaze suddenly beefed up for apparently no reason in MKA, I believe he still pwns as far as fighting and looks go, and originality.
mkda blaze kicked ass and his moves were kickin that ass too because his moves were so easy that i could do all his combos real easily thats why i like him in mkda cause in mka he was my second favorite plus since he was so big in that one his moves were real simple like 2 buttons to tap or 1 he didnt do alot of ass breaking moves u know thats another reason why i like mkda version thats all my opinons