The difference between the two Prison Day Tours, is that for the first one, you either get to do 'Doing Time' or 'Great Escape', which are two separate and different tours of different areas of the prison and are 30 minutes each. With the second Day Tour package, you get to do both and the tour lasts an hour and a half.
I went for both, it's obviously cheaper if you do both than doing the two separately on different days. And you get to see the whole prison - apart from the tunnels that you can only get to visit with the Tunnel Tour.
I have been to the prison twice since I've been here, and I've enjoyed the second time around as much as the first time. I haven't done the Tunnel Tour yet, but that is definitely next on my list.
The Tunnel Tour is apparently awesome. You get to go down 20 metres into the ground, before stepping into a boat to visit the huge maze of tunnels in the underground, where convicts use to work very hard every day of their life.