In a xenial VM (with Unity and Ambiance as theme), there is indeed a difference between the snap built from the debs, and the snap built from source: the snap built from the debs displays the expected colours and theming for GTK dialogs, whereas the snap built from source displays different colours and theming (Adwaita?).
In a xenial VM (with Unity and Ambiance as theme), there is indeed a difference between the snap built from the debs, and the snap built from source: the snap built from the debs displays the expected colours and theming for GTK dialogs, whereas the snap built from source displays different colours and theming (Adwaita?).