Looks like the same driver. However, their enclosure size is a bit larger, and they are using a different port. Tuning frequency between the two designs is not exactly the same. Looks like they used the larger cabinet space to hit a slightly lower port tuning. So very similar design, but not the same. My guess is that your cylinder port is better behaved than their slot port. Mark, if you took your design and gave it 20 layers of lacquer, you could charge 9k for it too!