I found this online map maker for anyone who wants to map out how far a species of palm is seen growing or anything like that. It is pretty neat. Here it is https://mapchart.net/usa-counties.html
Which of those two is best for a colder(zone 8a and 8b, with extremes up to -17C) atlantic(constant rainy yearlong, between 700 and 900mm annually) climate(summer temperatures around 20 and 22C)
UK is excluded because they have warmer winters, sunnier annually, and less rain.
Also I should mention that air is humid the whole air through.
So which one should have a higher probability to survive (with minimal winter protection), and the higher possibility to grow faster ?
(trivia knowledge: this area has an population of around 18 Million )