When I bought a J45 about 14 years ago, I choose between a standard with a spruce top and one upgraded with an adi top. Between those 2 guitars, the adi sounded significantly better, but I could only get them to significantly reduce the price on the standard with spruce. The original price difference was about $700 and discounted about $1,000 more for the adi. I bought the spruce guitar. Since then, the spruce guitar has really come into its own, so there might not be that much difference in the long run. But for $300 More, I would probably go with the adi.