nonclassical vs. non-classical

Question

I've seen both spellings many times, i.e. on Wikipedia, Dictionary.com and dozens of papers. I was wondering if there is a difference between US, Canadian, Australian and British spelling or if you can just use whatever you prefer?

(There was no good search engine result on this and it took me too long to figure out, hence this Q&A.)

Answer 1

Apparently both spellings are equally okay and are not connected to certain regions or accents.

Literature analysis seems to agree with this assessment:

Sources:

• Is the use of a hyphen between "non" and an adjective strictly necessary?

• non-living vs nonliving