Thanks for the advice!
Unfortunately, by closely inspecting the boots I've found several defects in them.
1- In both shoes, the Goodyear welt doesn't cover the end of the leather stitches properly. You can clearly see the leather stitch folding freely without the welt.
2- Another issue are the heels: one in slightly off-center, the other doesn't seem to be properly attached, in fact you can see there's some space between the rubber heel and the body of the shoe.
3- Lastly, the stitches covering the leather cap are made on a frayed thread.
I attach some pictures.
Can anyone tell me if these are real issues? Honestly, I don't want to break in shoes that are defective in nature, since I paid the full price for them, and I've only worn them twice.
Should I ask for a replacement, or are this issues common in IRs?
These are not defects and in fact are quite normal. Wear them and enjoy them.