I'd certainly do something like that. Maybe use "cardboard sleeve" or "sleeve" and "keep case" or "poly-box" for the slimline dvd-style cases.
Well, usually when there are two versions of the same item on VGcollect we don't add any special mentions in the item name for the original item but we add a mention in the title for the "second" or "odd" release. For example:
LocoRoco 2 [CA] (item #160501)
LocoRoco 2 (UCUS-98731F) [CA] (item #160502)
Those are the two canadian releases of LocoRoco 2 on the PSP. One has the original large PSP labels and the other one has the later "Slim" PSP labels. Since it's obvious which edition came out first, we do not give any special mention on the original release, only the second one does. This means that we must find out which of the two Xbox demo disc formats is the "original". Unless we contradict everything I just said and we instead use this example:
Grand Theft Auto IV (Fat PS3 text) [FR] (item #160189)
Grand Theft Auto IV (Slim PS3 text) [FR] (item #160187)
In this example the original relase still has a special mention in the title just like the second release.
So what should we do? I would like the admins to make a choice about this and set a standard so that I have the green light to create the listings according to the agreed standards, and sort this mess once and for all!