I just viewed it from the financial side of the issue. I really have no opinion on one being better than the other. I have only played on one diamond in my life. I liked it. Never played on an apex, so I really can't say. Just like any other table, if set up properly, it will probably play wonderful.
My brother and I recently purchased a gold crown 3 from Trent. Still working 7 days a week in the fields because the weather is cooperating too well. Going to set it up as soon as we get a chance. Once we get that set up, I don't think we'll be desiring either a Diamond or a Predator.