A:AnswerWe bought our's "in store" but it was not "in stock" (we could not take it home). Best Buy brought it out, installed it, and removed our old cracked glass cook top.
A:AnswerHello Chickensaurus, there are a few differences between the two models. You can view the differences in the links provided below.
https://www.samsung.com/us/home-appliances/cooktops-and-hoods/induction-cooktops/30--built-in-induction-cooktop-with-flex-cookzone--nz30k7880ug-aa/
https://www.samsung.com/us/home-appliances/cooktops-and-hoods/induction-cooktops/30--induction-chef-collection-cooktop-nz30m9880ub-aa/
^Rosi