When the KR-14 was first unveiled, it was also introduced with a seperate 'command model' intended to be used by squadron and battalion leaders. Aside from the upgraded balance system and thrust-vectoring systems installed in the shoulder pods, it also included a "Redesigned" head model that had color receptors. The unit also included an upgraded targeting control software system.
ASide from these updates, it was virtually identical to the A model and shared all the faults and failures of the earlier design. Even the 'improvements' over the A model were of questionable value. For one, what was the purpose of equipping vector-thrusters on what was supposed to be a basic land model? For another, the head model equipped is revealed to be a poorer, earlier model than the current spherical camera pod on the A type.
The UEPC answered that these changes were cost-juggling measures to possibly allow the C type to see action in space, but it has been pointed out that even with the thrusters, the C type is no better a unit in space than the unmodified A version. And although the unit does have color receptors, the tradeoff was resolution, and the head unit has none of the robustness of the A model.
Over time it appears that the criticism of the model sunk in, and only a limited number of C models were ever produced (numbers suggest around 120). Many were fielded in the roles they were intended, but UEPC organization largely uses other A models or another Axel type for unit and squadron command.
Sorry about posting another lazy edit of the KR-14, but this has been sitting in my files ever since the KR-14A model was first drawn. I didn't like the design as much, and the history that the unit was unpopular lingered, so here it is.