Different linux images? uclibc verus eglibc images?

Hello,

I'm relatively new to the Gaileo and Linux. I see different Linux images available for the Galileo both on this forum and on other websites such as http://alextgalileo.altervista.org/ and I'm just wondering what is the difference between them and which is the best one? What does Alex T's 1.0.1 image have exactly that the standard SD card image that you can download has? Does this have the Arduino IDE?

Also what is the difference between uclibc verus eglibc images?

Thanks

Tom