Probability of dealt same hand

[Gullanian]

Can someone help me with this, I've noticed something on a poker site and would like to test it.

4 tabling what is the chance of being dealt the same hand on 2 tables, and what is the chance of this happening regardless of suit?

The site im playing on, uncannily you get the same hands every now and then but very frequently, it's weird and I'd like to know the actual % chance so I can test this.

Thanks!