Contradictions in the Manual?

Page 29 under Damage types:

Only Engines = Damage which, once armor and shields are penetrated, only causes internal damage to engines.

Page 23 under Shields:

Be aware that ther are weapons that skip both normal and phased shields. These weapons are of the type Weapon Damaging, Engine Damaging, and Shield Generator Damaging. These weapons cannot be stopped by any means.

So, is there a difference between weapons that are

"Only Engines"

and

"Engine Damaging?"