Obviously, the size of the tower matters. However, in Stronghold Kingdoms there are several tiers of castle towers to be researched, from simple wooden scaffolds to the great stone ones. Obviously, each larger tower tier is more sturdy, thus harder to destroy, and allows more archers to be stationed on the top level (from 4 on the smallest, to 25 on the great tower). But the towers also get visibly higher as they progress in size.
The walls and towers give general height advantage over the attacking archers. However, is there any range difference between tower tiers, or is that hight difference is purely cosmetic? How does it play in desktop version of Stronghold franchise?