EMC-2-Arduino CNC/Robotics control firmware.

Hi:
It's me again. I have lots of problems building my own CNC. I'v got stepper motors that I don't know what kind are they, I just know that they have 6 wires .
1-About driving stepper motors, witch one of these two are better for me ????
2-How should I wire my arduino mega to drivers and motors ????
So many questions ha ?? XD
thanks :wink:

L298_ Dual_Bridge_Drive_5-500x500.jpg

l298n_dual_h_bridge_arduino(3)-500x500.jpg