Hi there,
I do understand it can be hard to make a choice about housing. Firstly, it depends on if you are able to keep them indoors, in which case, cage or C&C are great. If you have other pets then C&C may not be for you. Essentially C&C is metal grids of the same size which is fixed together and can be moved around to suit the area you have and then it is lined with a hard flexible plastic cut to size.
However, if you need to definitely house your piggies outdoors then hutch in a shed is good. Hutches do have their places in the piggy world, again it's down to personal preference, finance, ability etc. I would consider the cost of the hutch covers (insulator & waterproof cover), plus heat pads, water bottle covers. Also hutches can be low down so its worth considering if you are okay bending down to clean them out or have the hutch on a suitable higher surface. I got my hutches from Home to Roost. They have a sale on at the moment also. Not all hutches are the same, some are inferior quality i.e. the mesh is too thin and the latches are not secure. You don't want anything less than 4ft in length for two pigs. Lino for hutches will extend the life of the hutch along with the exterior cover. If you have a double hutch with a ramp, it might be worth considering some adaption of the ramp as often they are too steep.
I hope that helps.