ESP or EPS ?

EPS: Electronic Power Steering - enables the amount of assistance with steering to be varied depending on speed and how much you turn the wheel. This means it can give lots of boost when parking the car whilst still giving you a good feel for the road at speed.

ESP: Electronic Stability Program - senses when the car is about to go out of control and can apply an individual brake to a wheel to help avoid the spin. Will not totally prevent the spin but means that it takes more to lose control. Often also used to give traction control where brakes may be applied if a wheel begins to spin due to too much power for the grip. N.B. many cars have TCS (Traction Control System) without having ESP.