Mastering for vinyl and digital can be the same process if done correctly. A well mastered track for vinyl can be used for digital, just increased in level if required for digital after being mastered for vinyl. There are rules that have to be followed when mastering for vinyl, but no the are no strict rules for digital.
When mastering for vinyl the high frequencies must be tonally equalised in certain way, so as they do not distort when played back on a turntable. Excessive high frequencies, ‘S’s in vocals, cymbals, violins, flutes, percussion and so on can all cause unpleasant distortion if EQed incorrectly. Generally speaking, I would not recommend using a high frequency shelf boost if your material is coming out on vinyl. The thing is, it boosts frequencies above the audible range when you do that, but this can cause distortion in the audible range. Always use more specific parametric equalisation, and only do it if you can hear the exact effect.
The other important rule for mastering for vinyl, is to keep low frequencies in mono or as close to as possible. The reason for this is that stereo / out of phase bass causes up and downwards movement in the cutting stylus and this causes the grooves to get shallower and deeper. This can cause the playback stylus to jump out of the groove, as is has a conical or rounded tip, so cannot trace the shallow groove any more. The human ear cannot detect stereo below 450Hz anyway, so there is not point in having stereo information there.