I've played on both but I've never been involved with any transactions with Rasson before, so it's difficult for me to do a true apples-to-apples comparison. Diamond is a *great* company to work with. I've helped a poolroom purchase a fleet of them and I've helped friends purchase them for home use. I just love how you're working with Diamond from start to finish. They build them, they ship them, they install them. And, if something goes wrong, they'll fix them. So, Rasson is already behind in this race.
As a player, I prefer the Pro/Am. Really, the only table I'd consider comparing it to would be a Gold Crown. I love ball-return and no Rassons have ball-return. As well, although I compete on many different types of tables, the fastest growing brand for me is Diamond. The BCAPL events are Diamond. The Texas Open is Diamond. Turning Stone is Diamond. Most of the events on the DFW Tour are Diamond. And, many events I'd like to play in, like the US Open and Derby City, are also Diamond. My fiancé and I currently have a non-commercial non-recognizable brand pool table and although it plays decent, I can't help but think about the adjustments I'll have to make when I get on a Diamond. I know the Rassons are meant to play very similarly but why live with thoughts of what *might be* different? Just get a Diamond and *know* you've done everything you can to have a home environment as close as possible to what you'll be competing on.
The *only* reason I would get a Rasson over a Diamond is aesthetics. They're definitely prettier. Not sure when, but when we move, we will be getting a commercial-style table. If the new house has a game room, that table will definitely be a Diamond. If the table is going in the living room or the dining room, then aesthetics will be part of the discussion. I think Diamonds look great but they're sporty, very utilitarian-looking, and my future wife (also a pool player) will probably balk at the idea of making any presentable part of the house look like a poolroom. Rasson's Victory table really provides the perfect compromise for these scenarios.
In sum, if you are choosing between these two tables, you're in a good place. I can't see how you won't be happy. On a scale of 1-10, I think the Diamond Pro/Am is a solid 8. It loses points for being very utilitarian but hey, it's a commercial table built for poolrooms, and they don't age. Rasson gets a 7, maybe an 8, too. It's prettier and that's important in a home but its lack of ball-return and its lack of presence in the commercial market in the United States makes it less desirable for me as a competitive pool player. The perfect 10 would be if Diamond made a table with ball-return that looked like Rasson's Victory table but played like a Pro/Am.