Differential braking to tighten a turn is never used in a transport aircraft as tire scrubbing would quickly flatspot the tires on the inside bogey.
A combination of tiller and rudder pedal steering is used to turn a plane. The rudder pedals only have a seven degree from center operating range in the 727. Any turn requiring more than 7 degrees either side of center needs to be done with the tiller. The tiller is usually reserved for larger turns.
The tiller is very sensitive so small corrections like trying to maintain centerline of a taxiway or a runway are made much smoother with the rudder pedals.
On the Airbus 320,330,340 there are two tillers, one for the captain and one for the FO. These are the only planes I know of with two tillers.
The DC8 has a castering bogey which allows the rear of the inside bogey to unlock in tight turns to reduce tire scrubbing. The inside bogey unlocks when the tiller is turned more than 30 degrees either side of center. Hydraulic locks lock the bogey when the tiller is with in the 30 degree range and the bogey has centered.