I don't understand weapons stats

[Monthser]

Maybe someone can explain to me how it works. Take this example:

Weapon stats At char. attributes

Rapier of silver (superior)
Damage (+6)
45-57 attack 91-103
Speed: Fast
Dur. 74
Hit chance +1 hit chance +1


Broadsword of fine steel (superior)
Damage (+20)
34-45 attack 94-105
Speed: Medium
Dur. 126
Hit chance +12 hit chance +12


You see, if you look at the weapon stats you should choose the Rapier beacause of the 45-57 (broadsword is lower: 34-45). But (a big but) if you look at the attack (under character attributes) you see that the Broadsword has got higher attack: 94-105 and higher hit chance (Rapier 91-103 and lower hit chance).
So, why is that so strange and complicated?? How can I choose the right weapon? Which is best?
I really would appreciate if some1 could explain that to me. Thanks