The Mystery of Meta's near Identical Dresses?

[angelbruises]

Edit: Someone on facebook has told me the exact information I need to know! The dress on the right is in fact another dress that just happens to be very similar; Organdy Babydoll OP released in 2004 http://lolibrary.org/apparel/organdy-babydoll-op




A while ago I bought Metamorphose's Trumpet Sleeve Babydoll OP (left), then more recently I saw a dress for sale that at first glance looked identical, but upon closer inspection had several differences (which I directed my friend to and now we're going to almost-twin!)

However the dress on the right doesn't seem to be on lolibrary, yet there are 3 photos of it worn from the old-school days, where as mine (left) has only one, which seems to be the dress being modelled (unless you count the white colourway, in which case there's 2). I'm starting to wonder whether mine might be a sample version, or if it's more likely Meta just released two very similar dresses with slight differences.



My dress, the dress on the left, which is the one listed on lolibrary
http://lolibrary.org/apparel/trumpet-sleeve-babydoll-op-arm-cover



The dress on the right being worn.



The back of both dresses (still mine on the left and the other on the right). As you can see there's some more differences here, such as the left having the lace ribbons at the back also, while the rightleaves the chiffon open at the back. The left dress does actually have waist ties, but they're not visible in that photo since Wunderwelt put it on the mannequin the wrong way round.

The differences I've noticed are:

Right zips at the back, left buttons at the back

Right has flowery lace, left has different lace

Right has a longer layer of lace underneath, left does not

Right has 3 criss-crosses on the bodice, the left has 2

Right has a longer bodice, left is more babydoll

Right has gathered lace on the skirt, left has flat lace

Right has a different back to the skirt, left has the back of the skirt identical to the front

Does anyone happen to have a bit more insight than my speculations? Did Meta just decide to release two very similar dresses? Is mine just a sample version or something?
I'd really appreciate any information people might have, I'm so curious!

(also I apologise that this post is all over the place)