@leocg I've successfully directly copied over the simpler profile, with a bit more success, but on launching, the Opera windows kept cycling focus around and around at a rate of 5+ focuses per second with the device fans going flat out. This continued after I put the device into suspend mode. I've not seen this effect on Windows machines with copied profiles and have no idea what caused it. Closing one of the windows via the task bar stopped the focus issue and the migration now appears complete.
Thanks for the help.