The building in question is identical in size in Bing & Mapbox, latter though suffering from heavy fog world wide. As for mapping areas, I refer you to the Wiki that explains how to map an area with an inner space, where the building is. In ALL imagery there's a fringe around the building. If there is not in real life then the cutout is not even needed, just plump the building on. Since there's no discernable way to the building that would be OK

(In sources we may not us for mapping the building is also still the same fully enveloped by grass, looking like a utlility service building)

Obviously if the Mapbox imagery is newer v.v. particulars of new/replaced buildings and new/changed roads you make the best of it,

For aligning the imagery in ID Editor, here a video of several found on youtube explaining this https://www.youtube.com/watch?v=8s-pN6gpY7w

Otherwise happy mapping and stay cool.