Ok then the naming made a little sense, now when I know.
Isn't that ST7796S SPI as well and thus slow? I know SPI displays are slow but It takes literally half a second to fill the whole screen with a color.
A parallell 4" 480x320 or 800x480 Arduino compatible display workable with TFT_eSPI or similar lib and I would probably have bought it take right away.