For the methodical one, you're getting more reps in and varying them a bit. It also increases the speed between two notes, but different notes for the way that guy's staggering it.
I hardly do any practice so none of them apply, but then I'm probably not a musician. I do spend a few minutes a day on the Virgil Practice Clavier but that doesn't seem to fit in anywhere, technique perhaps.
Thank you so much. What do you think of those staccato - legato exercise?