How interested people are in their work, How much control they feel they have over their work are 19 times more important in predicting job satisfaction than are their salaries 和 How interested people are in their work, How much control they feel they have over their work are 19 times more important in predicting job satisfaction than their salaries are 的差別在哪裡？如果不好說明，請提供一些例句。

In comparisons, sometimes a second instance of a verb can make something less ambiguous. If there's no ambiguity then that second verb isn't needed. Both of your examples have the second verb, so here the difference is style. The first usage is not as common.

Ex 1) Their feelings are more important than are their salaries. (Less ambiguous, not as common)

Ex 2) Their feelings are more important than their salaries are. (Less ambiguous, more common)

Ex 3) Their feelings are more important than their salaries. (Can be more ambiguous in longer examples, pretty common)