No, there isn't a 1-1 mapping between the sub-types in the AdWords UI and the API. AdWords UI sub-types are mostly used for controlling which AdWords UI elements are available when working with a campaign in the UI. The
advertisingChannelSubType simply provides an additional refinement over
advertisingChannelType when specifying the primary serving target for ads within this campaign. Campaigns created through the API are equivalent to
All features campaigns. If you had selected a particular sub-type during campaign creation, this value will be returned in the response.
Shwetha, AdWords API Team.