Iran-Contra had the goal of freeing Americans held captive abroad.
Was THAT the objective of the huge operation at Bengazi?
No, that objective was to arm the allies of Al Qaeda.
Other than that they both were arms scandals I cannot fathom a single way that the two scandals are similar.
Not only that, but it supplied funds and equipment to the Contras, circumventing Congress. The only “scandal” was the Dems were outsmarted. The Boland Amendment was only a prohibition, so no criminal conduct occurred.