I suggest that you read DaveBugg's advice above. His input is usually very good.
He is an outdoor gear tester - seriously - he does it as a sideline for several gear manufacturers. In particular, his footwear recommendations are valuable for fit and buying your new footwear larger to accommodate the exact socks you plan to wear on Camino.
There are many opinions in this Forum. All are valid - from their perspective. But do read several before deciding what to do.
Remember, the TWO MOST IMPORTANT pieces of kit you will invest in are (in order): your footwear and your rucksack - PERIOD. Everything else is just carried.
That said, remember that no two feet are alike. Personally, I was evidently assembled by the angels from the spare parts bin. My left leg, joints and foot are stock "normal." However my right side is congenitally out of alignment both horizontally and vertically.
My right foot angle is off to the right-of-center by about 7 degrees. And, my right foot is angled about 3 degrees off-level.
My mother told me that I was a "forceps birth" - they had to use a tool to yank me out - not stupid ya' know! I wanted to stay in that nice comfortable and safe place. This might have caused or exacerbated my issues. But, at almost 70, I will never truly know. Whatever...
Thus, I have severe issues with ONLY my right foot. On two Caminos, I have had to take rest days and lay up to obtain professional podiatric (foot doctor) care along the route.
The answer here, and for many people is to consult your podiatrist BEFORE buying anything. If and when you do buy something, have your podiatrist check it out - on you - before you wear them outside and cannot return them.
As some very general rules for considering ankle or mid-high boots, versus hiking shoes or trail runners, think about this:
- If you are top heavy, especially when toting a loaded rucksack, or if otherwise prone to balance, ankle fatigue issues, or specialized foot structure issues (like me), I strongly consider the extra support and stability that the mid-high hiking boot can offer.
Yes, they can be warm in the summer. But you can experiment with different wool and synthetic socks, as liners and outer cushion layers, to mitigate the heat and humidity.
These mid-high boots are also available made with Cordura nylon or Gore Tex uppers for improved ventilation. I have a personal preference for the Keen brand mid-high boots and have worn several pairs of the Targhee II model on six Caminos. NOTE: I have no relationship with them.
- On the other hand, if you are thin, or relatively normal-weighted for your height, have no special foot, ankle, or balance problems, and can walk uneven terrain easily, then trail runners or low hiking shoes might be for you. I again commend the Keen brand to you.
Solomon and Merrill also make superb trail runners. New Balance has several very good models as well. Moreover, New Balance offers a broader size range for hard to fit feet.
In the end, do your research, do your due diligence and double-check your purchase with a medical professional if you have unique issues. No two feet are alike. No two footwear solutions will be completely the same.
Hope this helps the dialog.