Thanks for the compliments. Not sure that there are too many differences with the Irish Beetles, but I'm sure there are others that know more then I do!
There are shamrocks on the windows. The glass was made in Ireland to get around import duty. Import duty on cars was very high, on parts and CDK kits the duty was a lot lower. But in order to qualify as an "Irish" car there had to be a percentage of the car to be made in Ireland.
I was told the above on another forum. There is more info here,
https://www.vwmadeinireland.com/