got some details recently. Here is the reply from the Sun Certification Customer Support. Since the topic is kind of old (310/212-035), the same applied to -055.
"...... The only difference is the test number. The commercial tests begin with "CX-310" and the Sun Academic Initiative tests begin with "CX-212". They are the same tests and lead to the same certification. However, at this discounted price, you will not be receiving the lapel pin, logo and the wallet card. If these are needed you will have to take the exam at the commercial price.
Both certifications are valid prerequisites for the higher-level developer certifications. ......" [ October 11, 2007: Message edited by: KEIKI HIRAI ]