They differ a lot. The sore eye is just the eyes which feel hurt because of the dryness. You can feel its pain. However, the commonly known pink eye is infectious conjunctivitis, also called outbreak. It is an acute infectious ophthalmia according to different causes which can be divided into bacterial conjunctivitis and viral conjunctivitis. It may can happen all the year round, especially in spring and summer seasons where the bacterium is much. It can be contagious through the touch with one thing, like the towel. And you may feel the itching feeling when you get the pink eye, instead of the pain gets from the sore eyes.
Well, it is very easy for people to get confused about pink eyes and sore eyes. So first you should know that Pink eye is a bacterial infection caused by Staphylococcus or Streptococcus bacteria. Also, it is very contagious, so it can be very dangerous if you are with someone who has this disease. And also you should wash your hands frequently if you have it. On the other hand, a sore eye can be caused by anything, such as a blow to the face, even something you do not care about. But you can not judge them by yourself. If you have some problems, I will suggest you go and see a doctor and he can give you some eye exam. So that you can know what kind of disease you have got.
They are totally different conceptions. Pink eyes are caused by eye infection or inflammation. And they are contagious. So, people with pink eyes are usually require leaving alone. But sore eyes can be caused for many of things such as a blow to the face, allergies, tired or something get into your eyes etc.
The biggest difference of sore eye and pink eye is the feeling of these two situations. When you get pink eye you may feel that there is something in your eyes ,and actually,there should be pathological secretion consistently fuss you.On the other hand,tiredness and dryness will lead you to close your eyes more often when you get sore eye.
So it's easy to see that pink eye is much more severe than sore eyes.Just have a good rest when you get sore eye.Then see a doctor once you feel there is some stuff in your eyes,because you may get pink eye in this kind of situation.