Both names describe product families.
Formulations differ inside each category. Product name, technical data, intended layer, thickness, temperature range, and recoat window are more useful than a blanket claim.
A professional system may use both.
Epoxy may provide build or working time in one layer while a polyaspartic product provides a UV-stable clear finish. Other systems use different combinations. Ask why each coat is there.
Preparation outranks chemistry.
Neither category compensates for contamination, weak concrete, unsuitable moisture, the wrong profile, or a crew missing the application window.
Ask the question behind the slogan.
FactorEpoxy questionPolyaspartic question
Layer roleWhy use it here?Why use it here?
UVHow is light handled?Which formulation?
TimingFull cure when?Working window?
TemperatureAllowed range?Allowed range?