In patch 1.0.4, lots of Legendary/Set items received an upgrade. However, this upgrade was not applied to existing items. In the Auction House, these items are differentiated between when searching by adding [LEGACY]
to the end of the legendary name and new Set items have new names altogether. However, the actual item descriptions don't appear to have anything to distinguish them.
Is there any way to tell the difference between a 1.0.3 Legendary and a 1.0.4+ Legendary? This is most crucial when trading unidentified items.