To be honest, I hadn't even looked at the official art before for the ALTTP items: I must say the Tempered Sword reminds me quite a bit of the Gilded Sword in MM.

I voted for the Golden Sword, pretty much because I like the amount of damage it does.

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" I am the Hero of Time. No matter when, no matter where... for the sake of Hyrule and you, Princess Zelda...
I shall fight." - Link ( OoT manga )

Articles/Theories:
The Case for Kingship ~ Light and Shadow: The Tale of Two Princesses
Majora's Mask: Parallels in Love