Piano and Organ are musical instruments, and they have a lot of things in common. However, there are some noticeable differences between the two instruments. First of all, it is very important to know that the piano is a percussion instrument, while the Organ is a wind instrument. A piano is a musical instrument, which usually comes with seven octaves, although some are not up to seven and it has both white and black keys, which can be played by pressing these keys, and it produces sounds by causing the hammers to strike the strings inside.
Apart from pressing the keys one after the other to make a sound, dissonance effects can be formed by pressing more than one key at a time. Organ, on the other hand, can be electronic and there's pipe organ as well. An organ produces its sounds by depressing a key against an electric circuit which in turn gives a strong effect. When you press a key, it sustains itself for a period of time, unlike in piano where you would need to be pressing the keys repeatedly