Conditional coloring should allow you to compare the values of two columns

I’d like to be able to use conditional coloring when Column A not equal to Column B…or the opposite when Column A is equal to Column B but this option does not exist. Please add the ability to compare two column values.

Same, this is the main obvious use case for this currently useless feature

Still interested in this feature 2 years later

Have you tried to utilize a formula column and do the value comparison there.
Then set the conditional coloring on the formula column.
If formula column is “not equal” set row/cell color.