I use both versions actively, the main differences of SCEE compared to StreetComplete are the addtion of more obscure questions (for example building and roof colors, species/genus of trees), allowing direct editing of tags and disabling the gamification/statistics.

It's exactly as it says. SCEE comes without handholding which means should know what you do.

It's better to follow a guide on mapping and osm in general and after that you can use it without holding back.