Does changing URL structure effect SEO?

[mediadrug]

Simple changes with your URL, such as capitalization, adding a hyphen, an underscore, incorrect redirects, changing domain, etc. can have serious implications on your SEO. ... When any URL is changed, your organic search performance is going to change, which can be for the worse.

I don't know your experience with SEO. But if a proper 301 redirect is made from the old url to the new one then there will be no effect in SEO.