Maybe this chart will help:

500-grit This reaction causes the ball to read extremely early. This usually on works well on extremely heavy patterns or very direct angles by speed dominate players.

360, 1000-grit This reaction gives the ball more length than 500 alone, but still has a significant ability to generate friction in heavier oil. This works well on heavy patterns with fresh back-ends.

500, 2000-grit This reaction is a very good benchmark reaction as the ball has enough topography to still generate friction in medium to light oil, but not enough to cause the ball to read too early in most cases. This finish delays the hook transition, allowing for a strong entry angle.

500, 4000-grit This reaction works extremely well on multiple patterns, giving the ball easy length through the heads, a subtle but noticeable mid-lane reaction, and an enormous amount of friction at the end of the pattern. This finish can generate some of the strongest entry angles possible on fresh patterns, but may start to skid too far as the pattern carries downline.

Of course, there are multiple methods, resurfacing mediums, and grits available on the market, all of which will yield slightly different results causing a ball to read earlier or later, with more or less on the back-ends.
As a final recommendation, whenever making surface adjustments, our research has shown that the lowest grit should be applied with more pressure, but for a shorter duration. The higher grits should be applied with less pressure, but for a longer time. This will have the desired effect of creating strong surface deviations to displace oil, but will also round the edges, peaks, and valleys enough to get the desired amount of skid.