Help with concepts?

I was hoping someone could simply clarify the basic principles behind SOG V SCROG. What are the disadvantages and advantages? Im currently running a single flower box 4dx6wx10h bangen 600w overhead 400w horizontal.

I am interested in getting as much as possible with my current accommodations while keeping a reasonable amount of plants. To save space i will use female only seeds/clones. What Do You Guys Have Best Experiences With?
 
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