- What jquery claims to be different is the way it uses CSS or Xpath selectors to work with the dom (both html and xml). Comes out pretty short and neat. I really liked that part. made things easy for me in many ways.
- It has support for some ui components like sliders, capability to create curve edges to tables etc. I did not use directly. Other guys in the project have used.
- Also there are a bunch of plug-ins which are quite useful.
Another great concept I got familiar with was closures. I have sort of got a hang of it. but not completely yet.
Mean to try GWT sometime as well.