Is Savio just a voting board?

No - Savio has a voting board that you can turn on, if you want. A voting board is just another channel to gather product feedback alongside channels like your support tool or CRM.

How are Savio's voting boards different?

Savio's for people who don't want to build (entirely) in public. You can control which features show up on your board, hide vote counts, randomize the order features are displayed on your board, and more.