Yes, and no. CARBS will be larger then the TBG's. As well in practice the TBG's only ever fielded a coy regularly, the CARB is designed to deploy as a formation. The term the CDS, and the army commander are using is "they don't want a reserve army, they want an army in reserve.", the CARBS wont be as ad hoc in nature compared to the TBGs, as the end goal is the CARBs be able to deploy in support of the Manuver div over sea's if needed. Domestically by 2040 the Ares will fully take over DOMOP from the regular force, thus why the CARBs will be bigger.