You may have noticed that on both charts the head tube angles for all sizes are relatively slack compared to non-touring road bikes (and consequently, tour bikes oftentimes have more mechanical trail). Tour bikes usually have relatively longer wheelbases to better accommodate larger tires and fenders (e.g., more space between the rear wheel and the seat tube). And, the forks and rear drop outs have eyelets that can be used to mount racks. I noticed only recently that there has apparently been an urgent discussion in recent years about tour bikes with less trail as better for those who like to mount their panniers on the front instead of the back.