Realism is all about being real, capturing what actually is the actual object or subject to be captured by the painter or artist, without ‘extras’, capturing reality as it is, from skin tone to emotion, from the color of the sky to the color of the eye, and all the possible minute details.
Realism is the absence of exaggeration and artificiality. It is the truthful representation of what is supposed to be the represented. The subject as it truly is: the avoidance of personal preference and stylization.
The whole of realism does bounce between the idea of presentation, which is the truthful representation without a hint of personal bias, of a subject and the concept of photorealism, where the artwork is as real as it gets
If realism came to be a style that seems very academic, law-abiding, and structured and in form, it really is, impressionism as an art style differs, as it is an unorthodox representation of what the artist sees or is representing, or to be more precise, on what the impressions the artist gets from the subject. Impressionism involved a lot of things, and movement and transitions were the ones that matter the most. One may say that impressionism came as an evolved form of realism, for it is deeply rooted
Art forms continue to change and evolve
Either way, realism and impressionism, they contrast and complement each other as styles, but they still can totally and may considerably be two different forms or style, even if one came from the other, but one thing is for sure, impressionism evolved from realism, and does that make it a better form? Well, it will depend on what you need as a viewer, the exactness of realism or the feelings and impressions of impressionism, or do you prefer to experience both?
Your choice. Your art. Your life. Whatever it may be that you