Both the Kitty Poo Club XL and the Cats Desire Disposable Top-Side Entry are popular disposable, biodegradable litter box solutions. While both offer leak-proof designs, they differ significantly in size, entry options, and subscription models.

The Kitty Poo Club XL is built for maximum floor space, measuring 22 inches long, making it a better fit for cats over 20 lbs. It is primarily a subscription-based service where the box comes pre-filled with your choice of specialized litters.

The Cats Desire Disposable Top-Side Entry is a modular 3-piece set (base, lid, and pad). It is much taller than the Kitty Poo Club box, allowing it to function as a top-entry box with a 9-inch opening or a side-entry box. It is generally sold in multi-packs and allows you to use your own preferred litter.