As promised, here are the pics from my three X1's.
The Stealth Carbon Fiber X1 is called the Red Bull X1 Prototype, and it's awarded for getting gold in the X1 event.
The Cyan X1 (the colour may vary from player to player, since it's one of the colours available in the dealership for the X1, which is also unlocked at level 30) is called Red Bull X1, and it's awarded for getting Silver in the X1 event.
And finally, the Red Bull liveried X1 is called Red Bull Sebastian Vettel X1, which is the same X1 that you drive during the three tracks of the event. It's awarded for getting Bronze in the X1 event.
All three X1's perform identically, as they have the same engine, weight and aerodynamic characteristics, but since only the second X1 is a car that can be bought from the dealership (you need level 40 to be able to buy it and 20M Cr), the other two X1's are unique and can only be obtained in the X1 event.
Current PC Build
CPU - i7 8700K 3.7 GHz (4.7 GHz turbo) 6 cores OC'd to 5.2 GHz with Watercooling (Hydro Series H110i) | MB - Gigabyte Z370 HD3P ATX | Gigabyte GTX 1080ti Gaming OC BLACK 11G (1657 MHz Boost Core / 11010 MHz Memory) | RAM - Corsair DIMM 32GB DDR4, 2400 MHz | PSU - Corsair CX650M (80+ Bronze) 650W | Audio - Asus Essence STX II 7.1 | Monitor - Samsung U28E590D 4K UHD, Freesync, 1 ms, 60 Hz, 28"
