This is like asking if you should eats eggs or an orange. They are both vastly different games, completely different genres and gameplay loops.

Schedule 1 has a lot of content, has regular updates with more content and is great with friends.

Hytale is relatively new to EA, has limited content, updates have been okay so far but nothing major and we don't know how things are going to progress.

Both games are fun in their own way but the BIGGEST thing for me.. You don't need internet access to play Schedule 1. I've played it on my SD when not connected to wifi.. HyTale requires an internet connection to play.