Kingdom Hearts Princesses of Hearts Keyblade

The Keyblade that Xehanort's Heartless creates after he posses Riku was able to unlock the darkness in people's hearts, I wonder if the Keyblade could have greater significance than being the weapon Xehanort decided to create.

Aqua carries a keyblade that looks alot like it.

 

i dont see any resemblance between the 2.
Aqua's is shaped like a crown... somehow, but not like Sora's necklace.
Rikunort's i shaped like the outside of a heart. like if you drew a heart and you cut it off. the the part that look like a nice cleaverage, is attached to the blade.

 

The keyblade Aqua picks up is not anything like the 'dark Keyblade'.

 

They bear no resmblance. If anything, Aqua's keyblade looks more like the Kingdom Key because they both have a crown form to them in some way

 

I mean the one she uses to shoot that Black Heartless thing.