With electronic gyro need to tighten the steering spring to get faster response. Overall the bike will be more stable. with the stock gyro need to set the steering spring lighter to make the bike more stable as the gyro effect is lower. Especially at low speed track. I think it is all depend on track condition and traction.
The e-gyro is a complete kit come with flywheel, esc, brushless motor, wheel shaft, etc. The only thing you need to install it is 2 wires (to get the electricity to the rear fork) and sand away the tabs hold the original ring gear to the rear rims. Becareful not to reverse the + and - wire for the gyro wor. hehe
Mine is only normal mechanical gyro version. The e-gyro include the following (flywheel, esc, brushless motor, etc). It is not included with the motorcycle kit. It is available seprately.