There's definitely some grey area, but commonly "bikepacking" refers to mostly off-pavement rides, while "bicycle touring" means riding pavement or light gravel in populated areas. This distinction leads to differences in packing style too. Bikepacking luggage is often more streamlined, minimalist, and rugged, using bikepacking-style bags or smaller panniers. Touring, on the other hand, is traditionally done with racks and larger panniers. Boundaries are blurry though, so don't get too caught up in the terminology.