If I understand your question correctly you describe the effect of the rear differential. As a result, one wheel (the one providing more resistence) spins slower than the other. This is desirable when driving in a curve where the inner wheel goes slower than the outer.
On snow, ice, loose ground etc. it is often less desirable because all the power goes the to wheel with less traction. Hence some cars have a mechanism to lock the differential in such situations.
Bruno