The EnTama came out in November 2005.The UraTama came out in July 2006.
Same price, very similar features. Nothing uniquely new.
Well said binary! ^o^
Also, I got the following off Wikipedia. The first part is Entama facts and the second is UraTama facts.
* Released November 2005 in Japan.
* A small strand of beads is attached instead of a small strap or keychain.
* The antenna used on the Keitai, Keitai Akai and Tamagotchi Connexion version 3 has been extended diagonally with a ball attached on the end.
* The Entama can link to E-Tamago. In E-Tamago, the user can play games and activities. The user can shop for things for their Entama and even go on travels to one of the six lands- Mame City, Guruguru Town, Patchi Forest, Gozaru Temple, Furawa Gardens and Ichigo Gardens.
* The Entama features three character groups- Mamezoku (Intelligence), Memezoku (Style) and Kuchizoku (Kindness).
* This is the first Tamagotchi to remove two of the original functions- the discipline and the lights. The Tamagotchi turns out the lights on its own and in place of discipline is three disciplines- intelligence, style and kindness, increased by items.
* There are 55 characters featured on this Tamagotchi- 42 basic characters, 3 secret characters and 10 'Bikkuri-zoku' (Call Dating Service) characters. Thus this Tamagotchi has the most characters, beating Tamagotchi Connexion version 3 by 3 characters.
Uratama facts
* Released July 22, 2006 to Japan.
* Mono-color blue LCD.
* Similar to the EnTama, with stars replacing the round decorative "antenna" and beads; the blue-colored counterpart to the previous generation's red-colored "akai series".
* It signifies the "Ura" world.
* Connects with the TamaStation, which are large gaming type centers all around Japan, the DekaTama, Entamas, and Keitai.
* Within the TamaStation, the user can earn special items by winning Games For example: "Call dating service" which the care taker uses it to get special, Rare Character generations (three to earn)
* Currently 6 starter designs for when it comes out.
* New games, characters and new designs.
* Main characters have dramatically changed, for example, Mametchi renamed to Uramametchi, and features a tail, Ura Kuchipatchi has a horn on its head, and Uramemetchi has wings.
* Secret Characters can be obtained by getting urakuchipatchi, uramametchi or uramemetchi.