“Hunting” means different things to different people.
It could be sitting in a box blind, hanging from a tree in a climber stand, or standing next to a tree, motionless, for hours on end, in temps that could be 90+ (South Texas) to well below freezing.
It could be guiding a pack laden horse up mountain switch backs in that fickle fall mountain weather that could be raining/sleeting/snowing/blazing sun all in the same hour.
It could also be facing that same weather and mountain trail without the aid of horses.
It could be crawling through brambles and “wait a minute” vines after bear, or sliding across scree covered mountain slopes after mountain sheep.
Hiking, on the other hand is almost always on a marked trail. And, it is always an active activity. With hiking, the walk IS the activity. With hunting, the walk is what must be endured before, during, and after the activity.
Hiking clothing favors light weight and breathability, while hunting clothing ‘typically’ favors increased durability (those brambles, thorn vines, and scree) and warmth (long stands of inactivity in cold weather).
I have a bunch of outdoor clothing from REI, (and some of it gets used while hunting) but some of it is too lightly constructed for the sorts of activities that hunters engage in. For example, a puffy down jacket might be just the ticket for warmth and light weight, but get it snagged on a thorn vine and it will look like you gutted a feather pillow.