False. The Nexus 9 has a more powerful K1. It has the 64-bit Denver.
The Shield only has the 32-bit K1.
http://www.anandtech.com/show/8670/google-nexus-9-preliminary-findings/
Granted, the Shield seems to leverage it's 32-bit K1 better than the N9 in some areas, this could be due to lack of...