I thought it had been made fairly clear that the "Ornate" gear was a Wondrous Tails reward (shown on JP screenshot as "SP" gear variant of the Heavy Metal Cuirass of Maiming (that is the Ornate Heavy Metal Cuirass of Maiming)). I can't see an ornate upgrade item in of itself anywhere in the notes to suggest otherwise.
So the only difference between the (likely) rare Ornate Ironworks crafting gear and normal (crafted) Ironworks gear is that the Ornate variant has 5 100% slots, thus allowing sensible and affordable use of more Tier V materia to cap the stats on an item. For example the Ornate Ironworks Apron of Crafting is the same iLevel as the crafted Ironworks Apron of Crafting (i190). Therefore it's stats will be the same, meaning that prior to melding it is indeed inferior to the Augmented i200 Scrip gear. However following melds the i190 becomes superior to the i200, and with 5 100% slots for example:
Ironworks Apron of Crafting HQ (Unmelded): 254/80/4.
Augmented Hidekeep's Apron: 270/90/4.
Ironworks Apron of Crafting HQ (2x Tier V (100%), 3x Tier IV (Overmelds)): 277/91/4.
Ornate Ironworks Apron of Crafting HQ (5x Tier V (100%)): 287/94/4.
Clearly the Ornate then becomes the most powerful because it is entirely cost-effective to exclusively use Tier V materia, hence making sense to keep it locked behind the heavy RNG inherent in Wondrous Tails (see:
http://forum.square-enix.com/ffxiv/t...diculously-low )