[ecomodded]

If your coast is going to be relatively short pushing the clutch in would be the better choice.
A) Your going to press the clutch in anyways even if you wanted neatreal .
B) Why waste time then shifting it out of gear waiting 9.5 seconds then repress the clutch Put back into the gear when a simple press of the clutch is all thats needed, in the case of a short coast.

Once the clutch is pressed it disengages the drive from the gears, same as when in neutral. The clutch is only actively being worn when changing gears or first pressing it, not holding it pressed in.