there is no difference
A mini volleyball small and a volleyball is much bigger
volleyball uses a volleyball and basketball uses a basketball.
One is faster than the other!
outdoor volleyball is played by the beach. Inside volleyball is played by the gym.
The one big difference is that one is played inside and on court and is played outside on sand. Another difference is that you have 2 people playing rather than 6 on a regular game of volleyball inside!! And that's the difference between beach volleyball and indoor volleyball. Sources: I have played volleyball for 10 years!!
The difference between beach volleyball and sitting volleyball is that on the beach you do not sit to play volleyball where as obviously in sitting volleyball you would. Also I believe that usually disabled people play sitting volleyball. But I am quite sure that sitting volleyball could be played at the beach.
Push hockey does not have air like air hockey does
ice hockey is on ice floor hockey is on floor
The surface you're playing on. (It's also different from beach volleyball!)