The biggest advantage to the Lightroom Print module in my mind is that everything's in one place. If you're trying to prep a file in Photoshop, you're probably bouncing around between a half-dozen dialog boxes and menu items. In Lightroom, you switch to the Print module, and it's all right there, in order, in the sidebar.
Additional benefits, off the top of my head:
- Resampling is streamlined. You don't have to fight the dialog box like you often do in Photoshop; if you want an 11x17 at 300, you plug that in—once—and you've got it.
- Print sharpening is built into Lightroom, meaning you don't have to sharpen manually or use (and keep up-to-date with) a plugin.
- Lightroom displays a user-defined list of ICC profiles. If you only print on two papers, you only have to see two paper profiles, not every ICC profile (print or otherwise) registered on the system.
- Layout options! No messing with the canvas. You want a 6x9 in the middle of an A4 sheet with uneven borders, you move a couple sliders and you've got it. You want two images on one page, Lightroom puts two images on one page.
