Only been to one of each so no expert, but both the mrs and I enjoyed the openings better. The vibe at both was very good, amnesia's closing was exellent but still enjoyed Space Opening party more. But staying in Playa D'en Bossa was pretty depressing for the closing parties, it was like a ghost town-no food or beer on shelfs! People were bursting with excitement at the Opening parties, workers etc had the whole season it front of them. The closing seemed like a good goodbye party