Back when my husband got Ssdi they did rate him at 50%. We appealed the decision and got 75%. But that was many many years ago. They must have changed? The rating was the deciding factor in the amount he received.

Also he had the option of retaining his military disability pension or converting to va disability. He chose the va because they rated him higher than the Army and was able to get a higher pension through the VA. He is service connected.