Minds is the oldest platform among of these. It has a design similar to Facebook. Although it advocates free speech, the fact remains, it is a centralized platform. Users get rewarded by points in various ways, and by simply visiting the site every hour.

GAB on the other hand is the Twitter equivalent of Minds, only that it doesn't have a reward system in place unlike Minds.

In my opinion, Minds is more open to free speech than GAB. I have read some feedback regarding GAB censoring some of their user's posts lately.

When it comes to popularity and SEO perspective, GAB is more optimized than Minds.

The last time I heard, both Minds and GAB are on the way to launch their own social media token. Will they be running on top of a blockchain this time around? I don't know for sure about Minds but there are rumors about GAB will be using the EOS protocol.

I came to indirectly discovered GAB and Steemit through Minds. You can follow me here, and there, and there, using the same username IntrovertSpeaks.