It will have the same chip as the rg556. That's how the naming conventions work. The first two numbers are screen size and the last is chip generation. I think its the T820 in this case as 7 is the dimensity chip.
The Anbernic RG476H should be available before the end of the month. In the meantime, Anbernic has now shown its new 4.7-inch and 120 Hz retro gaming handheld running games from various classic systems like the Dreamcast, PlayStation 2 and the Nintendo Wii.