The Redmi 8's long-awaited successor launched in Spain as a device with 3 or 4GB of RAM. However, the noted tipster Ishan Agarwal now claims that some of its China-only SKUs will go up to 6GB. Furthermore, some others will have 128GB of internal storage, whereas its current European units have half that at best.
https://www.notebookcheck.net/The-Redmi-9-will-have-up-to-6GB-of-RAM-on-its-Chinese-debut-new-leak.477075.0.html