[Fantasy] Size Modifier for Dwarves

I understand the general rule regarding Size Modifiers from p. 19 of the core rules...

Quote:

Originally Posted by Core Rules, p. 19 Size Modifier rates a person or object’s most significant dimension: length, width, or height.

... obviously for a fantasy dwarf who is 4.5' to 5' this would be SM -1 if you accept the concept that a fantasy dwarf is proportionally identical to a human in every way except height. This is not correct. They are, in general, broader for their height than humans are.

So, my question is... is there enough of a difference to make a 4.5' to 5' tall fantasy dwarf a SM 0 like I think there is?

[Fantasy] Size Modifier for Dwarves