Weapons bought from traders or stolen from houses usually have 100% durability but those, e.g. For example, a weapon with 75% durability deals 1/4 less damage. You can always check weapon stats and easily check in what type of damage it is best. If you want to defeat the enemy in heavy armor, you should equip Henry with a blunt weapon (for example a hammer).
Swords and other sharp weapons are most effective against enemies lacking armors or using only light armor. Damage type is very important depending on who you want to attack. What type of damage it deals? The damage can belong to stab, slash or blunt type.Stick to weaker weapons and as you fight and spar your required parameter will increase. Otherwise, the weapon will be much less effective.
Remember about a few important factors when you are choosing a weapon for your character. Kingdom Come: Deliverance offers multiple types of melee weapons.