I've been on this site for over 4 years and just recently discovered the community section. Their rules seems to be on the strict side compared to gamejolt.
If you're devlogging on the community section remember that you would need to keep updating that page by posting replies instead of creating a new topic.
Also, devlogs in the game page are indexed, they appear in search results of search engines (Google, DuckDuckGo etc). I am not sure if the community stuff also appear in search results.
My opinion, It would be better to have devlogs both in your game page and the community page.
I wish you and your team all the best!