How much would I save by buying a F/F that uses 73kw less than the one I already use?

I have a choice of two fridges one cost less than the other. The 2nd one uses 73kw per annum less electricity apparently. I just wonder what the long term saving would be. I am trying my best to be as ecological as possible as I know our planet is in a fragile state. Thank you.....Vanessa