While the original KEYOne is built by TCL, the Limited Edition Black that retails in India is built and distributed by Optiemus, also featuring more memory and storage (4 GB and 64 GB vs. 3 GB and 32 GB on the TCL version).
https://www.notebookcheck.net/BlackBerry-KEYOne-hits-India-with-better-specs.239984.0.html