If you're in a hurry, mount it low and go shoot close targets. If you want to shoot long, it's a whole 'nother game. Now, Children, you mustn't believe a word of this, even if it is true. All the other comments are correct, of course, except when they are not.
It might help understand if you draw some exaggerated sight lines, extended bore lines, and trajectories of slow, high-arc bullets with each scope mounting. The low mounted scope will give you a much shorter "point-blank range," or a POI reasonably close to it without excessive mental fiddling. I like very tall mounts, for my own reasons. I don't like to explain or argue those reasons. We will get along better if people just accept the facts ... I like tall mounts, 20' bases, dual level vials, high magnifications, precision rifles, velocities in the mid 3's, lots of fiddling with bullets/brass, the Juenke machine, annealing, turning, spinning, half-seating and my own loading rituals. Eye of newt, toe of frog, yadda-yadda-woof-woof. And like most folks here, I do enjoy hitting little bitty targets wa-aa-ay out there on occasion. Sometimes a sage rat in the next zip-code has a lucky day ... and ... some days he don't. Some days the wind blows every bullet into a target's ear. And sometimes when the wind drops, a sage rat just naturally dies of "accidental gunshot wound" ... a long ways out. And we smile.
There's other days I can't hit a bull in the butt with a 2X4.