I have not had a problem with the width of the TK boots. I went a size up, and they are actually too big. When I eventually get another pair, I will probably order at my normal size. I also don't have particularly wide feet.
Boots from both vendors seem reasonably comfortable for hours of trooping. I have walked the Starlight Parade in my TK Boots three times, and they hold up for a good walk.
Adding a nice set of insoles can make a big difference in terms of being on your feet for a while. You might keep that in mind when you are choosing the size of your boots.
