That ticket is not equivalent. That ticket is only for Deutsche Bahn and similar. OTOH, the 9-Euro-Ticket is for all (!) local transport (incl. bus, ferry, ...

That ticket is not equivalent. That ticket is only for Deutsche Bahn and similar. OTOH, the 9-Euro-Ticket is for all (!) local transport (incl. bus, ferry, ...) and regional trains. That means here in Hamburg I can use all bus, underground train and ferry connections. It's also all month, 24hours/day.