The Nexus 10 has the weaker eco-system in comp. with the IPAD 4 (Ipad with retina display) but is due to the introduction of Android 4.2 on the best track to become the new leader on the Tablet-Market.
The IOS System has lost its pace and is made competitive again with a new processor.
The specs tell the truth. Apple with its IPAD 4 has lost the lead and Google with the Nexus 10 has become the winner (on numbers). X-Mas 2012 will reflect in sales numbers who will be number one.