Printing to scale shouldn't be a problem with either app, and if it was it wouldn't be a problem to do it right even with something as simple as MS Paint. It's the least of your worries.
You CAN create dungeons with regular CC3, but it's not recommended. You can get Dungeon Designer 3 for that, which requires the core CC3 package. Honestly, I don't think this is a great idea at this point. I'd recommend using Dungeon Tiles to build your battle maps. It's easier, it's more fun, and it gets better results for less money than you'd spend on the software.
On the other hand, if you want to build great overland maps, world maps, city maps and so on, you can't really beat Campaign Cartographer and its addons.