The Digital Holster 10 V2.0 is designed for smaller DSLRs, such as the Canon Rebel T3i, T2i, and the Nikon D3100, and D5100. The form-fitting design minimizes the camera case’s bulk, making it easier and more convenient to travel with.
The Digital Holster 20 V2.0 is designed for regular size DSLRs such as the Canon 5D Mark II, 7D, and 60D or Nikon D700, D300s, and D7000. The shape of the bag conforms to the camera itself, with one straight side and one curved side. It can actually stand up by itself!