After 7 months with the iPad Pro 12.9 5th generation, I decided to sell the 4th generation magic keyboard that I had because it didn't fully close with the iPad Pro. I chose the white color and the result justified me. Combined with the Space Grey iPad Pro, the result is aesthetically exceptional.
Also, the new keyboard is made of better quality materials that don't catch dust and fingerprints, like the black one. With careful use, it is not expected to darken or stain. Personally, I use an improvised cover made of transparency for protection.
The trackpad has better responsiveness, it is the same shade as the rest of the keyboard, while the keys, due to the white color, are brighter. Finally, it seems a little lighter than the black one. The compatibility with the iPad Pro is perfect, even though it has a tempered glass installed and the keys have a cover.
The 4 stars are for the high price, which is justified by its quality and functionality. I highly recommend it.