The new 512 GB option is only $100 USD more than the original 256 GB option. The highest-end configuration with 512 GB of storage and a 4K UHD touchscreen is also finally shipping for the promised launch price of $2000 USD.
https://www.notebookcheck.net/Razer-Book-13-with-double-the-storage-capacity-now-shipping-for-1699-USD.535963.0.html