Simple. 081 is the full exam for WCD based on J2EE 1.4. 082 (upgrade) is if you've already passed for WCD based on J2EE 1.3 and want to be certified for 1.4. (It's cheaper than the 081 exam I believe)
Not sure of the contents and make up of the questions on 082 though. Any one with experience?
Drove my Chevy to the levee but the levee was dry. A wrung this tiny ad and it was still dry.