The marking system is slightly different between the two exams (6 has more questions, but a higher pass rate or something like that; the details are in the FAQ, but that seems to be down just now). You can get some details from Sun.
Regardless of which one is "harder", I have chosen to do SCJP6. Java 1.6 is the current version, so the qualification will remain valid for longer. I don't see much point in passing an exam on a version that is deprecated.
When do you want to sit the exam? You may wish to consider the new SJP PLus exam (it's only in beta at the moment).
Joined: Feb 16, 2008
end of this month...
no its not like that number of question are same in both scjp 5 & 6
only difference is time<210 minutes for 6 and 175 minutes for 5> & of course some more topic are added in 6 and some are removed..
can you send me link of this scjp + from sun website??