Nah, couldn't be. Not dirty enough for FIFA.
In utilitarian net terms the (BAFTA award winning) scenario you posit is far, far, far, better than the current situation where an estimated 6500+ exploited migrant workers have died building out the stadiums and infrastructure.
It's not hard to coax someone into saying Coke tastes different to Pepsi. It does, but not enough to make a real difference to anything.
Similarly you can get someone to say one ball is different to another. And you will, if you want to get people to buy this special world cup ball.
We've all played with different balls at times. Did it ever matter at all? I think that prior has to stand until there's some quite compelling evidence that isn't just advertising in disguise.
Does it have an effect on the outcome of the game? No idea. But the feel is extremely different.
To GP: a difference in texture results in a slightly different technique in ball control and trajectories possible due to a friction drag.
As for GGP's comment: a professional football player can adapt to a ball in a couple of training sessions.
Probably they are all quite similar and having a new type of ball for a tournament is more about marketing and sales.
changing the equipment that all participants have been used to in the previous years is a weird idea.
Does the Italian Serie A use the same ball year to year? Do they use the same ball as the Spanish La Liga? Does either league use the same ball as the Champions League? Usually not. Top players are used to working new balls pretty regularly. It is part of the game.
Well, its a simple answer I think - its the way to sell the most amount of balls and maximise profit.
Footballers (all professional sportsmen really) are entertainers - they are there to harness the energy we have for what they do, and turn it into profits.