Should I choose Hike or Outdoor Walk?

I live in a residential neighborhood that is at the top of a fairly large hill (essentially a mountain ~300m tall according to the compass app) and any way you choose to come up or down is a pretty steep incline or decline. I work from home, but every day my wife and I go for a walk during lunch, and I ask myself if I should be choosing Outdoor Walk or Hike as a Workout option. I wouldn’t exactly call it hiking, but I tend to work up a HR of 140+ coming back up to our place during the steep parts (otherwise HR is 110-115 during the flat sections). I think it might be messing with the Apple Watch because for most part the walk is flat, but the ascending/descending parts are abrupt due to the steepness of the hill. My vo2 max is in the 33.5 range (35m) and I wonder if that’s playing a part and potentially messing with the algorithm?

Thoughts?