Mixing pan and tube watercolour paints?

You can mix pan and tube watercolors. The only difference between them is that the moisture content of the pan paint is greatly reduced. Tube paint uses a carrier to keep it moist. With pan paint you just pick up color with a wet brush. It is usually better to use paint from the same company, however; I have paint from several different companies and have not had a problem using them together. I use strictly tube paint, but that is personal preference.