Why do the RGB values specified for a Pantone color in the Formula Guide (Color Bridge Coated) differ from the RGB values specified for the same Pantone color in the Pantone color manager software?

[![Pantone Guide](https://i.stack.imgur.com/XtThB.jpg)](https://i.stack.imgur.com/XtThB.jpg)

[![Pantone Color Manager Software](https://i.stack.imgur.com/XUI4y.jpg)](https://i.stack.imgur.com/XUI4y.jpg)