What is the difference between GC3 and GCQuad?

As you may have deduced by the names, the GC3 is a triscopic (3- camera) system, while the GCQuad is quadrascopic or a 4-camera system. While both of these units are super accurate, 4 cameras are a bit better than 3. The GC3 does not offer putting analysis while the GCQuad does.