I have completed SCJP 1.4 2 years ago. Now, I would like to upgrade myself to either 1.5 or 1.6. but, surprisingly, the cost for the upgrade exam and the actual exam are one and the same. Is it really correct? Previously, the cost for the upgrade exams was 100$. Now, it is 300$ Is is worth spending this much amount to upgrade. I have fairly good knowledge in 1.5. Actually, I want to upgrade because I believe 1.4 is outdated and I want to present myself to others as SCJP 1.5. Is there any difference if I present myself as 1.4 or 1.5?