Well the clone is here to fight the original. Well this fight is pretty easy. Shadow proved who would win a long time ago. Shadow Android is just not at his level. Shadow is faster and has mastery over the famed Chaos Control. With that he would win. Shadow wins.
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In one ending in shadow the hedghog, we find out that shadow is an android as well. So wouldn’t that mean that shadow android wins?
We find out that he may be an android, but I believe that it is the genuine article. Or something like that, it’s been a while. Either way, the real Shadow has his feats from Sonic Adventure 2 Battle, which was his best appearence