I can promise you the new ones are the EXACT same as the RBSS balls weight size, material, etc... apart from (obviously) the colour.
It's not even close to being the exact same ball. The ONLY thing that's the same is the size.
The material on the RBSS ball is denim, while the red one is canvas, so it's not only a different color. The RBSS is lighter than the red one and the touch is better on the red one as well, which makes it like a normal ball in terms of feel, needing no time to get used to, unlike the RBSS ball which you need some time to get used to.
With all that being said, I'd advise you to rather get a quality ball like one of the Adidas matchballs (you can find them on sale easily), because they are great and will last you quite a while. But since even the Monta ball at 30 euros is expensive for you, the only option are cheap replicas, but those won't last you long and a matchball will last you longer than even 10 replicas, so you do the math... ;)
EDIT: Now I saw you said you've got an Adidas Finale ball, I suppose you have the matchball, so stick with it instead of buying a Monta ball.