I think it's more that the effective idea is the same, while the core idea is what is so vastly different. He was arguing as if light was affected by gravity. T

I think it's more that the effective idea is the same, while the core idea is what is so vastly different. He was arguing as if light was affected by gravity. This is totally missing the rather revolutionary idea of general relativity, best explained by John Wheeler: "Spacetime tells matter how to move; matter tells spacetime how to curve".