This handset will hit Brazil next month and there is no word on international availability yet.
http://www.notebookcheck.net/Asus-ZenFone-2-Deluxe-Special-Edition-has-256-GB-internal-storage.148478.0.html
i don't think the user need 4GB RAM , 256GB ROM but they don't demand for 5000mah battery for ultra long battery life. & the camera photo quality is worse due to most review , the 256GB i dont think its use as a HDD replacement.
256 GB is not that much, as long as the phone has good audio playback on quality headphones and the user likes to enjoy his favorite music in lossless format... ;)