No difference at all. Sometimes I'm using piloting and others I'm using
pilotage .... them's the same ting.

Shen

here ya go, shen. be enlightened.

pilotage

\Pi"lot*age\, n. [Cf. F. pilotage.] 1. The pilot's skill or knowledge, as of
coasts, rocks, bars, and channels

tr.v. pi·lot·ed, pi·lot·ing, pi·lots

1. To serve as the pilot of.
2. To steer or control the course of.

"piloting" means control of, steering if you will.

"pilotage" means navigation by landmarks.