A couple of years ago, I bought a Beneteau 393 and am very happy with it. I was also at the Annapolis show this past weekend and looked at most Catalinas and Beneteaus. Each manufacturer has its own general style and features, and in this class, it is a matter of personal preference. That said, I think it comes down to the particular boat, not just the maker. For example, I did not like the 40 foot Catalina from a couple of years ago, but I do like the newer 44 footers. Now, the same with the new Beneteaus (I don't like the 40 but do like the 43 or 46).
In reality, both manufacturers make decent boats. Keep both brands in play, and look at each particular boat offered in the size you are seeking. With used boats, decide based upon current condition, past maintenance, layout, features, etc. (probably in that order).