Analog: speed of the needle sweep shows acceleration / deceleration. Digital just shows your speed. Speed is continuous vs. discrete as you can't get from 0 to 60 without crossing 30 mph. That, and I get too OCD if looking at a digital readout, as if I'm trying to be at a precise speed.
This^^
I still dont have my 2.5l yet, but when i use a gps on my current car, it shows a digital MPH and i OCD out hard. For example, ill get it to 43, and tell cruise to accelerate twice to exactly hit 45mph in a 45 zone. this is focus i should be spending on the road.