A solid insulating sphere of radius \(R\) carries a net charge \(+Q\) distributed uniformly throughout its volume. A separate point charge \(+Q\) is isolated in space. Let \(\Delta V_{\text{sphere}}\) be the magnitude of the electric potential difference between radial distances \(r = R\) and \(r = 2R\) from the center of the sphere, and let \(\Delta V_{\text{point}}\) be the magnitude of the electric potential difference between distances \(r = R\) and \(r = 2R\) from the point charge. What is the ratio \(\dfrac{\Delta V_{\text{sphere}}}{\Delta V_{\text{point}}}\)?