difference in performance and testing的用法和样例：
- We find no difference in performance between the two in this regard.
- Shielding performance and test methods of protection material against X-rays.
- They differ in size but not in kind.
- "The expectation now is that there should be no difference in terms of performance and value between in-house and private practice," he said.
- Come and see her in performance with the new band.