The base pay is the same, but don't they have all kinds of extra pay they can tack on for various reasons? There is combat pay, but I'm sure there must be more than that.
The allowances in the Army are for things like jumping out of a plane, scuba diving, foreign languages, combat pay, etc.
The Army still has this attitude that if you aren't outside all day, running around yelling at people, then you must not be doing any work. I'm not sure if that will ever change.