He's described as a first basemen, so presumably he is not much of a fielder out in left. Although he clearly has a ton of power, that is mostly mitigated by his lack of patience, and he's not an overly high average hitter.
In total, yes, he could break out, but Ludwick was more of an exception to the rule, and it's always easier to bet on a guy whom is coming off a strong year of success at the major league level, even if it was preceded by some awful years (albeit in pitchers parks that seem not to have fit Ludwick's skill set). I think more than likely Moore is going to be a Jonny Gomes type. He's going to mash lefties. He's going to provide inadequate defense in the outfield. He's also probably not going to be an asset against right handed pitching.
In total, he's a guy that you consider bringing in to fight for at-bats, and spot in the right situation (and expand the role if it is meritted). I don't think he's a guy that you more or less hand the LF job to, especially in a year where the Reds are planning on contending. The loss of 1-2 wins by giving at-bats to an unknown quantity that doesn't project to being an above average major league starter could be a very regrettable mistake.