On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players. https://www.youtube.com/watch?v=j2Xn84L3Kcs
On the other hand, replicas (sometimes called training balls or gliders) are designed to be just like the official match balls but are much cheaper. Their panels are often stitched rather than thermally-bonded and are made of a different material. However, they’re not necessarily less durable than official match balls. So, they’re the recommended option for most players.
So it is now clear to you that you won’t have to worry about the air retention capability, durability. 

Now, how good is the playability? Well, in terms of rebounding, this ball performs almost like a standard ball but obviously not exactly like standard balls. Having said that, we must say the rebound is enough for recreational play and practicing purpose. You will also find this ball a bit heavier than standard balls during the shots. That is why we don’t suggest you use this option for tournament play.
While this ball is absolutely adorable and feels like it's a good quality, I'm disappointed with the one I received. It has little chips in the design—there are a few little white marks in the sections that are orange. Also, there is some sort of sticky stuff on the ball, almost like residue from an old sticker. I can probably remove it with Goo-Gone... I'm just not thrilled that it seems to be used or at least bought and returned. While I'm sure my nephew will love it for his 1st birthday party tomorrow, I'm mildly embarrassed to give it to my brother and his wife because of the appearance. If the party weren't tomorrow, I'd return / exchange it. Frustrating!
Adidas designs every World Cup ball, and on top of being a big seller for them, engineers at the company are constantly a little closer to the perfect ball, Goff says. The ideal soccer ball is a pimple-covered, perfect sphere, its surface just subtly textured enough to keep the airflow around the ball slightly turbulent. Unintuitive as this might sound, the ridges and pimples on the ball make it more aerodynamic, helping the ball to fly through the air more stably.
This 12-oz. ball works for players between 8 and 12 years old and has a circumference of 26 inches, larger than a size 3 and smaller than the size 5. This age group tends to play on a field of about 30 to 50 yards, writes Deborah W. Crisfield in "The Everything Kids' Soccer Book," with a goal size of around 6 feet high and 18 feet long. Again, the scale for the U12s falls between that of the U8s and that of the older age brackets for the No. 4 ball and the game as a whole. Some leagues may limit the No. 4 ball to U10s instead of U12s, so check league rules before making a purchase. 
For those taking their game to the next level, it’s important to train with a ball similar to what is used for your matches. Your passing, shooting and general foot skills will be different for lighter soccer balls made with a premium bladder like latex. Try out an NFHS approved ball which is used for some club, high school, and college teams. To be NFHS approved, the soccer ball needs to:
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