I can't say for sure. In terms of likes and views, I get more organic clicks through Twitter. For Facebook, my promotional posts are a hit or miss and likes are slower. Twitter's advantage is its limited number of characters. You're spared from beating around the bush, a tendency which most of us fall prey to when using Facebook. There are instances, though, that I hit gold mines with just a single post at Facebook because it allows you to tag as many people as possible and provide information without worrying about space.