The main difference is less chrome. The inner ring that previously separated the black circle with BMW letters from the propeller with white and blue cornerstones has disappeared. The chrome dividers between the sectors inside the emblem have also been removed. The remaining chrome now has a "smoky" tint.
The blue rim that BMW used to highlight electric vehicles like the iX1 is also absent on the new iX3. Additionally, the letters have become thinner, the black background looks matte, and the badge itself appears flatter.
This is not the first experiment with the logo: five years ago, BMW already introduced a simplified version, but it was used only in marketing materials. Now the updated logo will appear on production vehicles. Initially on the iX3, and later on other new or facelifted models.
Source: Carscoops