Logitech G27 or Fanatec CSR Wheel set?

[Primaguida]

Hello to everybody.

I want to buy a new steering wheel, but I don't know whether to choose: a Logitech G27 or a Fanatec CSR Wheel (not Elite!) with CSR Elite pedals and CSR shifter set.

Can someone help me to understand which is better for try to improve my race times? Has someone tried them both? Thank you