Can you explain to me what they are saying?
I think they’re saying that doing mitzvos for the purpose of bringing Moshiach, meaning with that primary intention and goal, is a stirah to doing mitzvos with the intention and goal of following Hashem’s command.
Not that they aren’t both His ratzon, just that our motive for doing mitzvos is to fulfill the specific ratzon that we perform those mitzvos, not the ratzon that the geulah arrives (although it might in fact hasten it).