I have worked on and race real cars for over 50 years. Yes I am the old guy. Some of the terms are the same in Real and RC cars, but applications are very different. Locked differentials are used on many rear axles but never on a front drive axle with the possible exception on a dirt car and then it would be limited slip. Terms like live, locked, spooled and ratchet differentials are similar but not the same in the real World. It appears they might all be the same in RC. Live and Locked have no means to slip at all. Ratchet and limited slip are the same in principle to allow the left and right wheels to turn independent on turns on hard pavement.
I understand some RC'ers use locked axles front and rear and even a different axle racial between front and rear. This would never work in a real race car, but maybe real drifters use it, I don't know. Drifting is new to me.
So any info to help this old guy try a new Hobby is appreciated. Never too old to learn new tricks.

My Corvette uses Limited slip and my Modified Midget uses a live axle.