Different brands market their cookware in different ways - the names change simply to confuse you!!!
There is little difference between a Chef's pan, a Skillet, a Saute Pan, Chicken Pan, Stir-fry pan etc. My advice to you is BUY ONE WITH A GOOD FITTING LID. this way you can use if for stews, casseroles, risotto, steam cooking, frying and much much more - 24 cm is a great size too.