The title is completely different between regions, with completely different cryptographic keys and ticket data is no good. The game data is same, this is when we handle loadiine stuff which is raw data and executables and whatnot. Since we are going around the security by working under different title and limited accessibility (Namely; SD card only) - it all works out even for region free and whatever.
But here we have to give one very solid point of FACT:
Different title, means different keys. Ticket is basically the needed crypto info to install the title. Different region has different title and 100% different key, completely.
No we cannot bruteforce RSA-2048 - that would be magical. Why not also give me some Sega Ringwide HDD rips when you are done those need only RSA-512 bruteforced.