IMO, the cabinetry crown should be the same shade of white as the cabinets. On another thought, does the wall crown molding profile and size match the cabinetry molding profile and size? If not, I can see two options: 1. Stop the wall moulding short of the cabinet and allow for a few inches of wall space before the cabinetry crown hits in the wall (which means the two shades of white won't touch) or 2. Have a bear of a time trying to scribe the cabinetry molding to fit over the wall crown molding. If by chance they are the same profile and size I'd still match the molding to the cabinetry.

I ask about the profiles because it is the issue that caused my hood to drop low enough for the cabinetry crown to hit the wall below my wall crown.

Is it worth doing a brighter white for the cabinets so that I can have my brighter white crown? Does anyone do cream crown? What does it look like?

Either cream or white, but do them the same. Otherwise, I believe it will look like a mistake, since they are so close in color. I am sure many people have off-white crown, or really any color of crown. I just personally think it gets tricky when you have something so close to white and then where do you stop it? If you are open to the living area, is the trim cream there, too?

If the crown goes all around the room, hood crown can be part of wall crown. If there's no ceiling crown, it should match the cabinet trim.

Really, the whole issue should be avoided. Go with one color, or very different colors.