Is there a way for premium vehicles to start researching planes straight away?

Hi, a vehicle earns RP towards itself (for modifications for example) and to a vehicle that you are researching. So you are earning RP towards the mark of distinction as well as the plane you are currently researching.

You can't cancel it from researching the mark of distinction and you don't have to. You also don't have to research the mark of distinction fully to be able to research a plane.