Yeah the only differences are the bio and how she's packed in.
The one at the con was packed in her queen outfit and labeled as Queen Marlena on the package and bio. The one on the site will be packed in her space outfit and be labeled as Captain Glenn on the package and bio.
Both figures come with all the accessories- including Cringer- so you can switch between both forms the only piece that's missing/different is the bio on the back of the card is different. The figure itself out of the box is the same.