No, there shouldn't be. Those characters who are neither dwarfs nor giants supposedly also differ by height but positives and negatives thereof obviously balance each other (you can reach higher but you are also generally less agile); it is not true that a 1.8m person only has benefits compared to 1.6m. And at about 1.9 you already get varicosis-related health problems. Moreover, I think 3Dmodel's height is also influenced by Prowess (might be a visual illusion though).