Blue Storm series

Further development of bluefire M/JP.
Thin topsheet, thicker sponge in max (called MAX+) version - think andro Rasanter.

Z1 and Z2 47.5 degree sponge, Z1 pimple geometry for speed (Rasanter V47?) and Z2 optimized for spin (Rasanter R47?).
Z3 is also optimized for spin, but only 42.5 degrees (Rasanter R42?).

I am not saying these are identical rubbers, but the concept sounds very similar ...

Of course it sounds similar, both are made by ESN in Germany
I don't even think Andro nor Donic do any real development, it's probably done by ESN and then Donic chooses one model they like with a blue sponge and Andro took another similar model and took a green sponge.

Originally Posted by Fabian

Of course it sounds similar, both are made by ESN in Germany
I don't even think Andro nor Donic do any real development, it's probably done by ESN and then Donic chooses one model they like with a blue sponge and Andro took another similar model and took a green sponge.

Fine tuning is done in cooperation with the brands, which is why no (or almost no) rubbers are fully identical.

It´s like a cooking or baking recipe, where you would add a little more of this ingredient, and I would add less of that but more of another.

some photos already?

Originally Posted by Fabian

Of course it sounds similar, both are made by ESN in Germany
I don't even think Andro nor Donic do any real development, it's probably done by ESN and then Donic chooses one model they like with a blue sponge and Andro took another similar model and took a green sponge.

Nailed it