The boots might give you a false sense of security as far as protecting your ankles. Read
@davebugg comments on response #18 in this thread:
https://www.caminodesantiago.me/community/threads/rigid-soles-on-boots.57644/#post-656125
Yes, thank you Trecile for the reference to Dave (who I consider the Master in all things about shoes) he makes good arguments that cannot be refuted so it is important to compare the exact specs of the boots or trail runners you are planning to purchase in those critical areas of height and width for stability and weight for fatigue.
I felt more protected and stable in my hiking boots compared to my hiking shoes. It might be delusional but I feel like I have an extra fraction of a second to recover with high top boots on than with shoes. The higher boots don’t prevent a sprain or twist but it feels like they give me an extra millisecond of ankle support to lift and replant before a injury or greater injury occur. But I will concede if in fact science has proved otherwise.
I brought on my trip Salomon boots and trail runners, Quest 4D3 boots & XAPro3D trail runners. REI weights for the pair of boots are 2lbs 13oz, the pair of shoes 1lb 11oz. My bathroom scale does't change when I pick up or set down a boot or shoe and that's the most accurate weighing device I have in the house.
I stand 1/8” taller in the boots. I can’t feel the difference in height or stability but I can’t argue with physics. My center of gravity is higher but I’m not sure how significant this difference is.
The boots have a wider sole in the heel section by 1/8”
The boots have a wider sole in the ball of foot section by 3/8”
I can’t feel the difference in stability with wider front and rear sole but I can’t argue with physics. My platform is wider and thus more stable but I’m not sure how significant this difference is.
For stability, by Dave’s criteria, my specific boots lose a measure to my specific runners due to height but they gain a measure due to width. It feels like a wash to me but perhaps it’s significant if the physics geeks want to try to calculate it.
Weight and Fatigue – one very light boot weighs 9oz more than one feather light shoe which is .0024 of my combined body and pack weight of 235lbs. Is 9oz significant from a fatigue perspective? For the ultra light community, it’s a resounding YES! I’m still in the ultra heavy community so I didn’t notice the extra weight of the boots while wearing them or carrying them. Someday I will but I hope it's many years from now.