Sync and Connect are pretty similar, but I prefer Sync. I like its design a bit more, also it is more customizable and has more features I use: customization of sorting for every feed and subscription, option to hide nested comments by default, button showing parent comment without need to scroll up. Also it can track comment count changes.
I think people are talking about Sync because it has ads and its pricing is too high.
This game looked like a scam before release. The developers copied art style and their trailer scenes from other games, and never shown gameplay videos. In the trailers it looked like AAA, but was developed by a studio without required experience. There were doubts the game existed at all. Well, it existed, but was far from what trailers shown.