[Dúvida] xbox 360 Wireless Network Adapter

http://shop.ebay.co.uk/i.html?_nkw=xbox+360+wireless+adapter&_sacat=0&_trksid=p3286.m270.l1313&_dmpt=UK_VideoGames_VideoGameAccessories_VideoGameAccessories_JN&_odkw=xbox+360+wireless+adapter&_osacat=0tou com umas duvidas qual destes adapters comprar...
qual as diferencas e qual deles o melhor...?

obrigado

http://cgi.ebay.co.uk/XBOX-360-WIRELESS-N-NETWORK-ADAPTER-Wi-Fi-BLACK-UK_W0QQitemZ380193598209QQcmdZViewItemQQptZUK_PC_Video_Games_Video_Games_JS?hash=item58854deb01

Existem 2 tipos:

Xbox 360 Wireless Network Adaptor (Xbox 360)
http://www.amazon.co.uk/Xbox-360-Wireless-Network-Adaptor/dp/B000AYTQ7O/ref=sr_1_1?ie=UTF8&s=videogames&qid=1262630470&sr=8-1

Xbox 360 Wireless 'N' Network Adaptor (Xbox 360)
http://www.amazon.co.uk/Xbox-360-Wireless-Network-Adaptor/dp/B002NPCDH8/ref=sr_1_2?ie=UTF8&s=videogames&qid=1262630470&sr=8-2

Por baixo tens detalhes sobre cada um e feedbacks.