Most jobs I've had require some dealing with the other. Knowing the differences and how to handle the interfaces would be a requirement for either position.
I'd certainly prefer to hire someone with both tools available, to use where appropriate, not a religious ideologue obstinately refusing to consider anything that's unpure.
I'd certainly prefer to hire someone with both tools available, to use where appropriate, not a religious ideologue obstinately refusing to consider anything that's unpure.