limelight given the pricing of their other products relative to their competition, its hard to see it going for less than US$10,000. But even at 8k the Decent still maintains a price advantage of 2 to 3k.
Also, based on the information provided, the Decent would also maintain a significant advantage in the capacity to alter variables (temperature, pressure, flow rate) at every stage of the pour. The fact that the display on the Synesso is not a tablet as such would lend weight to that theory.
Where the Synesso will probably have an edge would be the steam and being able to pour and steam simultaneously. So for lovers of milk coffee, it likely has an edge. For espresso nerds/tech heads, not so much.