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"Oh, I think we're completely different," Jess Sponenberg said.

"Completely different," her identical twin sister Tarah Sponenberg replied.

Just don't tell that to the girls on their respective teams. Even they get the two confused from time to time.

Tarah coaches the Angels. Jess coaches the Hawks. It's the ultimate sibling rivalry.

Earlier this year the two met for the first time on opposing benches.

"I didn't sleep last night," Jess confessed. "It felt like Christmas Eve."

You'll have to watch the story on 9NEWS at 10 p.m. to see who won. Of course, even then, you might find yourself wondering which sister was the victor. They are identical twins after all.