Whereas Micro Four Thirds camera can be used with any MFT lenses, so you can choose between Panasonic and Olympus lenses.
When deciding on your camera, you’ll want to consider the lenses that go with the camera body. There are pros and cons to each kind of camera and its lenses, and often you’ll find you need to buy into a brand. For example, Canon cameras can only be used with Canon lenses and Sony cameras can only be used with Sony lenses (unless you buy an adapter). Whereas Micro Four Thirds camera can be used with any MFT lenses, so you can choose between Panasonic and Olympus lenses. It’s a good idea to have an idea of the range of lenses available before you buy your camera body.