Personally, I would not know what the House of Orleans does, but the succession to the head of the house of France was not determined by equal marriages. It the "ruling days" marriages were more political alliances than anything else.
In contemporary terms, the whole idea is out the window. The House Of France, no matter who one supports is full of divorces, mistresses and more than "unequal" marriages.
As there is no throne of France to inherit, nor likely is there to be, the whole concept of "morganatic" and "Equal" is silly and elitist