Fastsky,
Make up a quick and easy test. Cut a slot for a Dubro flat pinned hinge in a couple of pieces of balsa. Drill the holes for robarts too. Use the hinge glue and take only the minimum effort. After the drying time suggested. Try to pull each apart. Then go ahead and cut what's left up to see how well both are glued to the wood.

I think you'll find that both types were very, very solidly glued to the wood. I wound up trying to hold the balsa in a vice without crushing it so I could pull harder. And autopsys of crashed airplanes will have pulled hinges, but the flats are still solidly glued completely to the shredded balsa that was pulled out with the flat.

Robarts are excellent and easier with hinge glue.
Dubros are excellent and easier with hing glue.

I wish I owned the company.