意思不同，competence是能力的意思，而performance是表现的意思。Competence是名词，作名词时意为“能力，胜任；权限；作证能力；足以过舒适生活的收入”。Performance也是名词，意思是“性能；绩效；表演；执行；表现”。

Competence的例句

Would you say you had the competence for handling money?

您认为您有理财的能力吗？

She added her name to the list on the noticeboard.

她把自己的名字加在了布告栏上的名单里。

It has beyond the competence of the court.

它已经超出法院的权限。

Performance的例句

We have looked grand sight performance of firework at New Year's Eve.

除夕我们观看了壮观的烟火表演。

He failed completely in the performance of his duty.

他完全没有履行他的职责。

The performance of such an analysis is very complicated, but the results are simple.

要完成这样一个分析是极为复杂的，但所得结果却是简单的。