Which to get is a personal thing, mostly based on how you expect to use it and how long you expect it to last.
For longevity, get the beam. The mechanism is about as simple as it gets and the driving force, gravity, is as dependable as it gets. I got my first scale in '65, it's as dead on accurate as when it was new and it's still going strong. No electronic insturment is that dependable.
Speed is something I can't fathom. Digitals typically have a time lag of perhaps a half second to register a weight, all magnetic damped beams settle in two seconds or so. Is that a lot of time difference? Up to the user.
Beams tend to be much more sensitive. My beams (2) respond to a single kernel of 4831, never seen a digital of any kind be that sensitive. And beams respond immediately to a change so they follow tricklers more precisely, IMHO.
Most of those who say digitals are easier to use or read are likely setting their scales on the bench top. That's fine for a digital but poor for a beam. If the beam and trickler are properly set on a shelf at about nose level and near a stand mounted powder measure, the work flow will be easy, fast and the scale will be quite easy to read. Tool placement counts a lot, if the scale is on one end of the bench (and poorly lit) while the powder measure is on the the other end, don't blame the scale for its being slow to use!
Most digitals drift in use, requiring frequent zero and calibration, beams don't. Dititals require steady electrical power and room temps, beams don't care. Digitals are sensitive to stray electrical and magnetic fields, beams aren't. Digitals can easily suffer unseen internal damage but if you damage a beam you can see it and be warned. If you are working with max charges your scale need be off just once and you may never care about reloading again!
If you don't care much for price or tool longivity the digitals can be great. If you measure/weigh a lot of cast bullets or cases then a digital will be great. But for the prime purpose of weighing powder, the beam is king of the hill.
I'm happy for those who have and love digitals but I was a life-long electronic instrument tech in the defense and space business, there are no digital scales on my loading bench.