If we are going to consider that there is a SCALE from soilless mixes all the way to EXXXXTREME hydroponics (aero), I'd say it goes something like this:
-Simple organic soilless mixes based on peat
-Simple organic soilless mixes based on coco fibre
-Simple inert mixes based on fine particulates (perlite, vermiculite, washed silica sand)
-Simple inert mixes based on coarse particulates (hydroton and other clay pebbles, washed granite stone)
-Fibre media (rockwool, long-fibre coir, fibreglass insulation)
-Minimal media hydroponics (NFT, DWC where only the stem is supported)
-Aeroponics using collar supports or baskets with little or no media at all

I think hydroton is the dog's bollocks. Remember to wash ALL media first with water at pH 6.