Market place SEO link building Vs SEO packages

Dear members
Can any one explain which one is best to buy links for fresh money site.
SEO packages or Link building
Because both are giving same kind of services. I am quite confused to choose the best one.Because I felt both are similar.

Still now I thought only link building section only available for getting back links.

if your site is new I recommend you to buy diversity packages first

& SEO packages section is the right place for you.

What are the diversity packages and why are they good for new websites?