Generally, these transformers will give you half the input voltage. The UK used to have a 240 volts mains supply and the rest of Europe was 220 volts. We have now standardised on 230 volts across Europe and I think Australia is 230 volts as well.
What this means is that you will probably get 115 volts out of both of them. A variation of ten volts either way on the mains supply is not uncommon and is nothing to worry about.