Tomtom One Xl Europe Map Why Buy UK Map SatNav When Europe Version Same Price?

Why Buy UK Map SatNav When Europe Version Same Price? - tomtom one xl europe map

I live in the United Kingdom. . Looking to buy one of SatNavs TomTom XL. They sell UK & ROI version and the full version of Europe. What surprises me is that they are the same price.
I think it makes sense to buy the Euro version, if you choose to visit the rest of Europe - but no one knows whether the UK and ROI version has a certain card or best value? (Otherwise, my question - why buy in the UK Limited / version of the ROI if the Europeans had the same map of the United Kingdom, most of Europe, if you know what I mean?)