Coral Painter 2015 preview

I'm new to Corel Painter 2015 and have been using it on my 27" Mac. I was checking out the autopaint feature and noticed that the result I see on my monitor doesn't exactly match the jpeg I open in Photoshop. Is this the case with any monitor? I'm considering buying a Cintiq 24 HD and wondered if that would give me a better representation of what my saved jpeg would look like.

Thanks for any help

Ed