Homepage link will crawled quickly and most visible.. content link will get clicked if only read it.....many users stay in home page and leaving.... Also will take time to crawl the link.. so better is home page link
In this case relevancy matters the most. If your webpage is relevant to the content page but not with home page, it would be better to go for content link. But if home page is relevant to your webpage then link from home page will be more beneficial for your site as Google crawls home page frequently.