What is the difference between "three strings and four products" and "two strings leisure" of classical guitar?
I don't know what level you are. Since you can read the staff, tuning the strings is not a problem. There are many different chords between guitar strings, and the sound is the same. There is no difference, just a difference in fingering. For example, this section of E sound is pressed with two fingers, so #F here must be pressed with four fingers without marking, G sound should be an empty string with three strings, A sound here is pressed with two fingers without marking, and the next B sound is pressed with four fingers.