Since you're in Europe, you can probably get Motul cheaper than us here state-side...
If so, I would HIGHLY recommend Motul RBF600 for a street driven car. It out-performed the ATE Blue "Race" fluid significantly in my application, though admittedly that does not mean it is inherently better, I am just providing an anecdote.
Brakes are the ABSOLUTE WORST PLACE ON THE ENTIRE CAR TO "GO CHEAP" (actually, they are TIED FOR FIRST WITH TIRES). Stopping is infinitely more important than going, if you value your life. Always go for the best brakes and tires you can, they're the only thing keeping you from slamming into a wall at a speed your face might consider unpleasant.
I know I advocate certain boutique oils, because I have had good experiences with them and like to share those with others, in hopes that they will have good experiences too!
But, with brake fluid, we're not talking about "better lubrication" or "cheap stuff works fine"... We're talking about what keeps your pedal from going limp when trying to stop from 120km/h...
You can always replace an engine, but you ONLY GET ONE LIFE...
/endrant