Using soul sand or soul soil to make the soul campfire doesn't change anything about how the campfire works. However, it does change the normal color of fire to a cyan blue.

The campfire, new to the village and pillage update, creates smoke that brilliant people in the community have been able to manipulate to create Typewriters or smoke signals.

Minecraft Redstone | Minecraft Campfire900 likes for more Minecraft Redstone Creations?Learn how to make Campfires in Vanilla Minecraft! No Command Blocks needed! Or, if you don't mind a few, you ...