What is the difference between Capillary Column and the Packed Column? GC Columns would be needed in many types of manufacturing solutions. Thus, there would be a need for special capillary columns or packed columns depending upon the need. But, there should be some amount of technical knowledge on the part of the buyer or the user so that they know what would be the best decision for them. Knowing the basic difference between the capillary and the packed columns would be vital. So, just look down at the features given below.