The points you have for your EOI are not what decides whether you get a JSV or straight out Residence.
Your application will be checked out thoroughly by the CO - that is, all your evidence will be verified by asking other people to confirm it. When that is all done (which can take months), then the CO will call you to arrange an interview with you. It is how the CO is impressed by your answers in the interview that make him/her decide what visa you ought to be offered. The interview is designed to find out what you know about how things work in NZ, both in your career and in society in general, to see if you would be likely to impress an employer and be quickly offered a job, and also that you are prepared to manage your life efficiently, like sorting out housing, medical care, school for children if any, etc., without being distracted by those things from your work - this is all known as 'employability'.
If the the CO is fully satisfied, then Residence is offered. If the CO has doubts about aspects of your preparedness, you can be offered an SMC JSV (also known as deferred Residence), which gives you the right to nine months in NZ to find skilled work, and if you do, you get the Residence you originally applied for. If you appear to the CO to lack most of the necessary information, you will be refused. Here is the official information about the CO interview.
http://www.immigration.govt.nz/opsmanual/43652.htm And here is an old thread with questions from the interviews. (The regulations have been the same for a long time, so don't be concerned that the early posts date back several years.)
http://www.enz.org/forum/showthread.php?t=27398