You should not notice much if any difference in motor performance.
However you will notice some servo perfomance.
Digitals have several advantages over analog.
Are they 100%? No.
One of the main issues I see in my TC is power off of center.
Analog servo need to deflect so far to produce power, digitals produce a lot more power off center so they offer more precise servo control around the center point.
Just another 2 cents...