Problem: Continue the following story.

Erin is rated as the better concierge when compared to Kayla, so 
Here's how I want to continue it: Kayla has probably done it for a fewer number of years.

Problem: Continue the following story.

Laundry gets done much more quickly by Laura than by Betty because 
Here's how I want to continue it: Betty is slower at things in general.

Problem: Continue the following story.

Jennifer earned royalties from the music that Katrina created, because 
Here's how I want to continue it:
Katrina sold the rights to the music.