
Tequila Sunrise |

What is the difference between specific weapons/armor and bonus-equivalennt abilities? For example, why is there not an entry that reads:
Subtlety: A subtle weapon grants a +4 bonus on the wielder’s attack and damage rolls when making a sneak attack with it.
Moderate illusion; CL 7; Craft Magic Arms and Armor, blur; Price +2 bonus.
instead of the description of the Sword of Subtlety that appears in the DMG? or:
Grace: A suit of grace armor has a Maximum Dexterity bonus 6 higher, an armor check penalty 2 less than normal, a spell failure %15 less than normal and weighs half normal.
Faint abjuration; CL 5; Craft Magic Arms and Armor, freedom of movement; Price +2 bonus.
instead of the DMG's Celestial Armor?