The connection between ENSO and the North Atlantic region is a bit trickier than the relationship between ENSO and North America. The ENSO/North Atlantic-Europe link has been subject to considerable debate, but some argue for a robust connection. A few of these studies suggest that this link is sensitive to the details of the tropical sea surface temperatures in other basins, such as in the tropical Atlantic (for example, this study and this study). If true, that would mean that we need to consider each event individually and avoid making too many generalizations about previous La Nina or El Nino events. In this case, my general advice would be to review various sources of forecast guidance for the target season of interest, like what the North American Multi-Model Ensemble (NMME) provides.