"This is a very different entity to what exists today as the EU."

If you're using that as an excuse for holding the 2016 referendum, then the argument for having a rethink vote now must be equally valid. What we KNEW in early 2016 is vastly different from what we know NOW. If you believe in democracy you must embrace the idea that the electorate must have the maximum possible information in order to make an informed choice. The choice made in 2016 was made with far less information than we have now. By that measure, the choice we made in 2016 was clearly uninformed.

"You cannot compare apples to oranges."

What we knew in 2016 was the apples. What we know now is the oranges.