My two cats are sugar and spice.
sugar and spice
idiomTwo things that are fundamentally different from each other.
Origin
disputed originPerhaps from sugar and spice and everything nice in the nursery rhyme What Are Little Boys Made Of?.
The two business partners are sugar and spice, yet they work together perfectly.
Although the two siblings share a home, their personalities are sugar and spice, leading to constant but affectionate disagreement.