When I brought my station I wasn't fussed whether I ended up with a digital or analogue one. In the end I went with a digital one because it was only a few £ more than the analogue. I'm glad I did too, because digital has a useful feature. On my iron, the digital readout displays the current tip temperature. When soldering something into a pad on the ground plan for example, a lot of heat is typically drawn out of the tip, and you don't want to move onto the next pad until the tip is back at the desired temperature. The digital read out tells you this and so stops you moving onto the next pad before the tip is up to temperature, which would result in a potentially messy/cold joint.
