The 30-second take
Otter, in one paragraph. Orderzy, in another.
First, the product in one line: Orderzy is a complete dine-in system. Guests order by QR at the table, at the counter, or through your staff. That is the product. Everything below is how it is priced or where it fits.
Otter is built for delivery chaos. A busy restaurant often has three aggregator tablets, three menus to keep in sync, and three places orders can land. Otter unifies all of that into one screen. That is a real problem, well solved.
Orderzy is the opposite. The center of gravity is the diner physically at the table. Pay-at-end dining sessions, table-tagged orders, branded QR cards, smart-table waitlist detection. None of those have anything to do with delivery.
If most of your orders come from aggregators, Otter probably fits better. If most of your orders come from people sitting at your tables, Orderzy is built for that.