The best of all Luxor games. Quest for Afterlife features the original gameplay but is the only part of the series (I played so far) that has an upgrade-shop. With the Coins you collect in the game, you can buy upgrades for your power-ups such as making the scorpion smash another two orbs each time or increasing the fireball radius. Or you can personalize your wing and your balls with new designs.
And the game features unique game modes such as 'Crossing the River'.
If you just want to play along the standard Luxor-gameplay, you might not like this part of the series. But if you like to see a progress in your game and not just watch the levels get harder, Quest for Afterlife is the part of the series you are looking for. It even has some kind of story and sort of 'Open World'-map.
All other Luxor-Parts are just new graphics and some different power-ups and maps, but nothing new. I really don't understand why they removed all the innovative parts from QfA in the newer parts...