There is really not very huge differences betweeb two For more information follow this link Check <a href="http://faq.javaranch.com/java/Scwcd5Faq" target="_blank">this FAQ</a>
Ignore the SCE vs CX. They are not different versions.
However, 310-081 was the 1.4 exam and 310-083 is the 5.0 exam... but the exam really is no different. The ScwcdFaq pages on the main SCWCD forum page explain why.
A good workman is known by his tools.
Hey, sticks and stones baby. And maybe a wee mention of my stuff: