XRAY - Model racing cars

Could someone explain to me the effects of running the diffs in lower/higher positions ?

Affects of diff positions are mentioned in the manual.

Front:
Front diff upper position provides more steering but provides less front traction. Recommended for medium - high grip tracks and technical tracks.
Front diff low position provides more front traction but makes the car more push on power. Recommended for low traction track.
Rear:
Rear diff upper position provides more on-power steering but makes the rear slightly more loose. Recommended for medium - high traction tracks.
Rear diff lower position provides more rear traction, mainly on power traction and makes the car more stable in the chicanes, but makes the car push more on power. Recommended for low - medium traction.