Each method has its advantages and downsides. DWC is ideal for small-scale and indoor gardening because:
You need just a bucket of water.
Yields are mostly bigger.
No bugs/soil parasites.
Growth rate is higher.
At the same time, DWC requires more labor, as the crops growing in the soil are more autonomous (to an extent). Plus, DWC makes you a persnickety gardener as it requires precise calibration of nutrients, etc.