Two of the most popular spray-on bed liners are Rhino and Line-X, which both typically require expert installation. Line-X is known for being harder than Rhino, making it a better option for some types of hauling but worse for other types.
The softer feeling of Rhino bed liner means that it's less likely to damage objects in the back since it provides a bit of cushioning. Its softness can also help make it less noisy than Line-X. However, Line-X fits along the contours of truck beds better than Rhino, and its hardness makes it less prone to cracking. Regardless of which bed liner a driver chooses, proper installation can lead to better performance and longevity.