Soccer in the 1940s was Bord but now thre's more fun. "And better soccer balls".
a air filled is air filled and and international is sticky
If there are no spaces between the soccer balls then somewhere in the 6,000.
the size
the balls and the name
I believe the difference in the two balls is the bounce.
NOThing
There is no difference, they are the same.
There is no specific collective noun for soccer balls, in which case a noun suitable for the situation is used; for example a sack of soccer balls, a bin of soccer balls, a rack of soccer balls, etc.
Soccer balls are made out of rubber
balls
balls