That's not easy to answer. It's a question of: - mutable data vs immutable data - tables, row based vs tripple store, attribute based (EAV/RDF) - table schem

That's not easy to answer. It's a question of: - mutable data vs immutable data - tables, row based vs tripple store, attribute based (EAV/RDF) - table schemas vs attribute schemas - relational connections vs graph connections - SQL vs datalog - nested queries vs flat queries and rules - remote access vs client side index etc.