Southbound - I think you'll find they don't. Having 'done' transport in NATO (2* and above to not get bog standard is the rule) and having many contacts in the civ world I know the cost differences - especially when booking fairly short notice.
Many civ firms will fly you at a higher level if the journey is longer - 5hrs being a common break point. No doubt more mature members of this board get higher levels of treatment, but the norm is towards reducing unecessary costs, like Business Class for short haul.