Which is correct?

The meaning is the same in either case. In everyday usage it is far more common to omit the "being"; it's just not necessary.

Exactly, brevity is the soul of wit. If you include words that add no extra meaning you're being verbose.

Thank you very much.

And one more question, are it ok with my sentence below?

- I am hardly anywhere near as being good at swimming as he is.

- I think the show was nowhere near as being satisfactory.

Of these two sentences, I wonder, is it still the same and correct no matter whether BEING is omitted?

I am nowhere near as good at swimming as him.

I think the show was nowhere near satisfactory.

Again, shorter, but exactly the same meaning. Only add words if they add meaning, as in.

I am nowhere near as good at swimming (the breaststroke) as he is.

I think the (musical) show was nowhere near satisfactory.

In the second example I've changed as him to as he is because in the first example swimming is a noun, it refers to an activity like football or chess. In the second example it's a verb because it's describing how an activity (the breaststroke) is performed.

You could write, I am nowhere near as good as the breaststroke as him.

Izzy: Again, shorter, but exactly the same meaning. Only add words if they add meaning, as in.

Would Izzy's example be common in newspaperese, Merry?

Thanks again. Your answers are of much help to me. I get more enlightened.