I was reading that the difference you were feeling was in flex, but I can see now you're just talking about the smoothness of the bearing. Because of the different structure of the cartridge beaings they will feel smooth due to no preload. However, if you DA BB is properly broken in no pitting or fretting of spindle or cups) it should still feel quite smooth. In any case the difference is 99% psychological, as minor differences in the BB bearing are not going to slow you down. My advise is to just get out and ride, rather than spend time changing parts that are working fine.