ARod is pretty close to 3000 hits, yes. But, if at his pace, he's got to play healthy next year to get it. He won't get in this year. He's getting up there.
They are very, very close to being essentially the same player at the plate, which is why A-Rod is one of the greatest of all-time.
But Mays was a more dominant fielder.
He's signed to play 5 more seasons, and needs only 163 hits. He only needs to be moderately healthy. In other words, barring a career ending injury, it's a lock.
As for fielding, ARod was a fantastic shortstop, but we're comparing apples to oranges since Mays played the OF. I never saw Mays play outside of the awesome highlights, so I'm curious as to how you're defining that Mays was more dominant. I'm Sabremetrically inclined, but don't put too much faith in defensive metrics, let alone those that are retroactively calculated.