The just doesn’t seem like it should be a thing:
One has the name “Wightblade” and one is the blade of a wight. Its weak but distinguishable
Weak is an understatement, throwing “The” in front of something and removing a space is not much of a name change.
You’re beefing with something that claims to use “the vitality of the dead” to grant the wielder more health. 
Apparently it has seepage too. Gross.
Touché.