What would be different to Titleist balls?
"A responsive ionomeric casing layer"? (from the company's ProV1 internet page)
Have you ever experienced ionomeric pixels on your screen?
Certainly not, nor "Nike Speedlock RZN Core" nor "more distance, control and durability from Callaway" which are advertized in the Pro Shop. These ain't possible in a virtual game.
The only "real" difference would be the logo, apart from a certain composition of virtual characteristics, program parameters defining the "flight" - ehm - movement characteristics.
And you would be attracted by the name, likely be poised to spend more for those than for other virtual images of other brands, and you'd be a perfect client in this game, being fooled to pay real bucks (or lifetime) for imaginary products.
I tell you what, you should be glad to be off this hook here, probably because Titleist as the world's leading brand don't need to pay for this, while Nike apparently can't pass this advertizing opportunity.
Have fun!