Multilanguage Website

[albertoalchieriefficio]

Hi, I am responsible for managing a multilingual website.

I have two questions regarding SEO, based on the structure of the website.

Question 1. At the moment we have one website for UK English and one for US English

.com/en-gb/

.com/en-us/

Which would be the pros and cons of merging the two website in one?

Question 2. For the German website they moved it under .de dominion, I think it would be better from an SEO perspective to have it as the Italian and French, under .com/de

Which would be the pros and cons of migrating German website under .com/de?

Thanks