We have already seen firmware for the LTE-enabled Xperia Z3 Tablet Compact SKUs certified by the PTCRB. Both SGP621 and SGP641 variants are certified with build number 23.0.1.A.0.167, which incidentally is the same version that was recently certified for the Xperia Z2 and Xperia Z2 Tablet. This is likely to indicate no UI differences between these devices. We’ll keep you posted as the Xperia Z3 Tablet Compact launch nears.
Thanks Ben and Rene!