If you're used to using grated Romano and switch to grated Pecorino Romano, then you will see a big jump in flavor. At the same time, though, it won't be as flavorful as freshly grated Pecorino, which is what I prefer.
This being said, I would still be careful with the pre-grated Pecorino, as many people find Pecorino a bit too powerful tasting. I wouldn't put it in a anchovy category, but it's not for everyone- at least, not when you use it with a heavy hand. I think L&B uses the perfect amount.