[Gun Fu] Gunslinger and Mounted Shooting question

[Captain Joy]

Originally Posted by Gun Fu, p.8

Shooting while riding requires you to roll against the lower of Riding or shooting skill to hit (p. B397). Gunslinger lets you ignore this.

The Mounted Shooting technique [Gun Fu, p.28] does not contain "If you have Gunslinger, this technique is redundant for you." – a sentence with seems to be in every other technique when appropriate.

My question, what does the Mounted Shooting technique provide to a character that already has the Gunslinger advantage?