What are the differences/similarities between those two articles written 14 years apart?

Article: How to combine a deepening and widening of the European Union

https://www.ecb.europa.eu/press/key/date/2000/html/sp001122.en.html

Article: The European Union: wider and deeper?

https://www.tandfonline.com/doi/full/10.1080/13501763.2014.899115