Both of these phrases are saying the same thing in two different ways. AT: "Write this vision clearly on the tablets" (See: [[rc://en/ta/man/translate/figs-parallelism]])
Possible meanings are 1) that the message is easy enough to read that a messenger can read it as he runs from place to place proclaiming the message. AT: "so that the one reading the tablets might be able to run as he reads" or 2) this is a metaphor in which Yahweh speaks of reading something very quickly as if the person who reads it is running. AT: "so that the one reading the tablets might be able to read quickly" (See: [[rc://en/ta/man/translate/figs-metaphor]])
Yahweh speaks of the events in the vision happening as if the vision were a person who speaks. AT: "the vision ... will finally happen" or "the vision ... will finally come true" (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-personification]])
Yahweh speaks of the events of the vision taking a long time to happen as if the vision were a person who does not arrive soon at his destination. (See: [[rc://en/ta/man/translate/figs-metaphor]] and [[rc://en/ta/man/translate/figs-personification]])