Are these the same thing or are they different?

Climate zones is a broad term, including heat, rainfall, sunlight, & other
factors. The Sunset zones could be called climate zones. Plant hardiness zones
are the same as USDA zones. They refer strictly to which plants will survive
the winter in different areas.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)