The Portuguese edition probably came in the same big box as the Spanish edition, with Spanish and Portuguese on the back, but the contents are different, including the discs themselves. The Portuguese edition came with a sheet from the distributor, Ecofilmes, and another paper sheet. Other items may have been included. There is also a yellow sticker on the front, but it is not certain if that is official.
Thanks to eBay member konanrtub (image 1).