Frame tends to make top-heavy facial markings. It wants to spread out and make a bald face, much like it is on this horse. It will avoid the ears if possible though. Again, this is just demonstrating the whole 'frame' nature that it was named after - it wants to leave white on the nose and the ears, thus making the face white framed with colour.
Splash tends to be bottom heavy. It often gives blazes an 'apron' appearance, where they noticeably flare toward the nose. Splash also tends to 'slip' and make face white uneven on the face - more to the left or right, not centered. Again, splash will try to avoid the ears, but will try to cover the eyes if it can.
Sabino tends to be the 'messy' white. It likes to give the horse a chin or lower lip spot at least. Its edges tend to be less neatly defined, and often seem to roan or bleed out to the colour parts. Sabino seems to also like to keep white off the eyes, and like the other two, will also try to avoid the ears.
Read more: what color and pattern will I get