Epoxy is commonly used as a foundational coating in decorative flooring because it can build a substantial, continuous layer over properly prepared concrete. In a full-broadcast flake system, a pigmented epoxy base gives the decorative chips something consistent to bond into and helps create the visual foundation for the finish.
Polyaspartic is commonly used as a protective clear topcoat. It can provide a durable, cleanable finished surface while helping the decorative flake retain its depth and handle exposure to everyday traffic and sunlight. The visible shine is only one part of the reason it is used; the practical wear layer matters more.
The debate becomes unhelpful when it implies that one product alone solves every floor. Concrete condition, moisture risk, temperature, service requirements, finish direction and the existing surface all influence whether a primer is needed, what basecoat makes sense, what texture is appropriate and which topcoat should close the system.
At Rose City Customs Epoxy Lab Inc., we talk about the complete build: prep, repairs, base, decorative broadcast and topcoat. That makes the recommendation easier to understand and avoids selling a material name as though it is a substitute for the work underneath it.