Supertags vs. profiles
Tana's supertags are genuinely innovative. Tag a node #meeting and it gains fields for date, attendees, and action items. Tag it #person and it gets email, company, and role. The system is deep, but you design the tag hierarchy, define the fields, and apply the right tags to every piece of data.
Synap's profiles do the same job — typed records with property schemas — but the types are applied for you. Drop in a messy note about a meeting and Synap proposes: create an event with these attendees, extract three tasks with due dates, link it to the project. You review and approve. Same quality of structure; none of the effort.