Amount of hands affects the dmg? o.o

How is it that I have a slightly better range when I'm wearing a 70 att two handed sword instead of an 80 att one handed sword?
:\

 

Because 2H swords have a higher attack damage multiplier than a 1H sword.

 

attack damage multiplier? what does that mean?

 

https://royals.ms/forum/threads/hero-guide.57080/#post-303855

If you look at this guide in the weapons section, it details the differences of a 1h sword and a 2h sword.

 

Ty!