The Realme GT3 has officially been launched. It is perhaps more a successor to the Realme GT Neo 3 150W than it is to the Realme GT2 and is, in fact, called the GT Neo 5 240W in China.
The Realme GT3 ditches Mediatek, which was used on the GT Neo 3, in favour of the Snapdragon 8+ Gen 1, the flagship chipset that has been superseded by the SD8 Gen2. It then bumps up the battery slightly by 100mAh to 4600 mAh.

The phone then has a 240W charge speed, the fastest on the market, capable of 1-50% in 4 min, 1-100% in 10 min.
The screen has changed a little as well, it is a bit bigger, has a fractionally higher resolution of 1240 x 2772 pixels and is now 144Hz
The Realme GT3 will be available in 8+128GB, 12+256GB, 16+256GB, 16+512GB, and 16+1TB variants; global recommended retail price starts from 649 USD.
Oddly, Realme have not announced a Realme GT3 Pro, yet. We will likely see a proper flagship phone launched from them sometime in the near future.