GlassFish - one product, multiple installers
By alexismp on Sep 02, 2007
Most GlassFish users are familiar with either the "jar" installer from glassfish.java.net or the Java EE 5 SDK installer. Once GlassFish v2 is released (September 17th is still on), there will also be Sun Java System Application Server 9.1 installers to address enterprise customers needs such as package-based install.
This blog from Sathyan explains the differences between the various installers and the implications of choosing one over the others.
These are all different installers for the same GlassFish bits.