Difference Between Flashing Drain and On-Grade Drain?
Just read the brochure, its all in there.

On-Grade Drains
on-grade floor drains are for use in
ground-level applications, or where a waterproofing
membrane is not needed.
Flashing Drains
Flashing drains are typically installed when
a waterproofing membrane is used to protect finished
areas under the drain.

you are going to want an on grade drain for almost all basement slab applications