You can import it into either but why? If you did it in photoshop and it's good you don't need to take it anywhere. Do you need to change it? maybe if you showed us what you have and what you want to do to it we can give better advice.
First, I think you need to find out for sure from your printer exactly what kind of file he/she needs or wants to be able to print your designs....then we can go from there.because the guy that does printing for me either doesn't have photoshop or doesn't know how to use a photoshop file. i don't know. : /!