I never knew about 'focal'world' but I think you gotta go with what feels more right for you. i.e. ease of use, friendliness, layout etc. One thing I noticed with this forum... When you reply to a thread, you can still see all the posts in the thread above where you are typing. Brilliant.
I had a look at focalworlds' terms regarding our image rights, and they seem to be similar as here, except this site doesn't explicitly say 'You retain copyright over the Content'. I'm not in the small print business so maybe I read it wrong.
focal world -
https://www.focalworld.com/help/terms/
"You are granting us with a non-exclusive, permanent, irrevocable, unlimited license to use, publish, or re-publish your Content in connection with the Service. You retain copyright over the Content."
dprforum -
https://dprforum.com/terms-of-use/
"1.5 With the publication of contents the users themselves – or in the name of the copyright owners – give the owner the non-exclusive right, to duplicate, modify, change, publish or translate without any restriction of time and location on these sites."