it's using the kenai one, i think

from the MANIFEST included in the jar:
Manifest-Version: 1.0
Implementation-Vendor: Sun Microsystems, Inc.
Ant-Version: Apache Ant 1.6.5
Implementation-Title: Java Bindings for OpenGL Runtime Environment
Implementation-Version: 1.1.1a
Implementation-Vendor-Id: com.sun
Specification-Vendor: Sun Microsystems, Inc.
Created-By: 1.4.2_11-b04 (Sun Microsystems Inc.)
Specification-Title: Java Bindings for OpenGL API Specification
Specification-Version: 1.1.1a
Extension-Name: javax.media.opengl

the jogamp one has changed the package names to be be com.jogamp.*

which one should you use? sorry, but i don't see why that is even a question. one is included, one isn't, it's not like you have much say. but, yes, for looking up references use the sun / kenai one.