OEM cartridges are those that are manufactured by the same company that makes the printer. Compatible cartridges are made by third-party manufacturers. There are pros and cons to using each type of cartridge. OEM cartridges tend to be more expensive, but they're also more reliable. That's because they're designed specifically for use with a particular printer model. Compatible cartridges can be a great way to save money, but it's important to do your research before buying them. Make sure you buy from a reputable manufacturer, and look for reviews online to see what other users have to say about the quality of the compatible cartridge you're considering.