Depends on your feet and preference and shoe material (type of leather). Those of us with toughened feet due to wearing leather shoes for a good amount of time can be perfectly comfy in an initially snug fitting shoe. Tenderfoots may need to size up as you feet will get larger during the day.
Thanks for the input. My preference is a rather snugg fit, and this case it's essential since the shoes in questions are loafers (still deciding between boxcalf and suede)
In this case however, I did get a white blister on my right heel from walking maybe two dozen steps on the store carpet (left foot was perfectly comfortable, I suspect I have a minor difference in feet size), so maybe I'm overdoing it.
Let me ask this way: if I a shoe is comfortable while standing up and feels tight (not painfull, but still enough to cause a blister initially)), while walking, can I safetly assume it will break in eventually?
What material (suede vs. boxcalf) have a greater chance to break in sucsessfully?