Next weekend I plan to buy a Sony Z1 Compact. Right now I have a rooted SGS2 with Android 4.3, custom rom (Avatarrom). I use Titanium Backup and this has always been great for restoring apps including their data, but that was always on the same phone. I think I'm going to root the phone immediately, connect my google account, reinstall all necessary apps from the Playstore, and then use Titanium backup to restore data only. I'm not going to install a custom rom right now I think.
I wonder if this is going to work out, if you have tips, what the risks are, what to watch out for.