Will Oxycontin and Percocet show up the same on a drug test?

I was wondering on a standard drug test for a job. Would Oxycontin and Percocet show up the same since the main ingrediant in both is codeine?

: http://alcoholdrugstreatment.info/will-oxycontin-and-percocet-show-up-the-same-on-a-drug-test