Nice find. I count about 80 viable die sites compared to around 95 for a Montecito wafer. That suggests a die size of between 650 and 700 mm2.
The larger die size, 65 nm processing, and smaller LLC area fraction probably means Tukwila has a manufacturing cost of around $175 to $200 vs $125 to $140 for Montecito. That figure doesn't include recovery of devices with one or more defective cores.