The Centrino Wireless-N 135 card is recommended since the drivers are already installed in the SD card image. On the other hand, the Centrino Advanced-N 6235 card is used in the following guide: Intel Galileo Meets Wireless - Malinov Family Web Presence, so you might want to take a look at it.
Additionally, you can check in the following document which wireless cards are compatible with the kernel version used by Galileo (3.8.7): Intel® Wi-Fi Products — Linux* Support for Intel® Wi-Fi Adapters. Besides the Centrino Wireless-N 135 card, I haven't tested other cards so I'm not sure if you would have any kind of issues with the drivers. Anyhow, I recommend you to use the Centrino Wireless-N 135 card since it is the one that has been tested.