* 2001 Chevrolet Malibu: This refers to a specific model year of a mid-size sedan. It had various trim levels (like base, LX, etc.), each offering different features and options.
* Chevrolet LS: "LS" is a *trim level designation* Chevrolet has used across various models (and still does) over many years. It's typically positioned as a mid-range trim offering a good balance of features and price. A 2001 Malibu *might* have had an option for a trim called "LS," but that wasn't a consistent naming convention across all model years of the Malibu. An LS trim might be seen on many other Chevy models from that time period, like the Impala or even trucks.
In short, you're comparing an entire car model (the Malibu) to a trim level designation (LS) that may or may not have been available on that specific Malibu model year. They aren't comparable in that way.