3dmark is only one benchmark. It definitely has some merit, but the closer the scores are, the less definitive the result is.
Looking on notebookcheck the 6310 appears to be 19% better than the ion. For the most part, the 6310 will be better, but depending on the game the results could change.
I just noticed, though, that the 6310 doesn't have as many benches as the ion, so it might be different than notebookcheck suggests.