Hey guys this is a detailed list, the Xperia Z was just announced so going of GSMarena specs, if there are any errors plz correct the list, thanks!
Nexus 10
Higher resolution
Higher PPI
Wi-Fi Direct?
Direct updates
Stock Android
More Ergonomic? (rubber rounded back)
Xperia z tab
LTE/4G
Lighter
Thinner
Premium Design
Dust proof
Water proof
S-Force surround sound
microSD
Wi-Fi hotpot
Infrared port
Blutooth 4.0
8mp camera
LED flash
2.2 front camera
Nexus 10
Higher resolution
Higher PPI
Wi-Fi Direct?
Direct updates
Stock Android
More Ergonomic? (rubber rounded back)
Xperia z tab
LTE/4G
Lighter
Thinner
Premium Design
Dust proof
Water proof
S-Force surround sound
microSD
Wi-Fi hotpot
Infrared port
Blutooth 4.0
8mp camera
LED flash
2.2 front camera