This process could potentially give an unfair advantage to one candidate over another.

这个过程有可能使一个候选人相对另一个来说有优势，这是不公平的。

youdao

They had been given an unfair advantage.

他们得到了不公正的好处。

《牛津词典》

The first question we will ask is: "What gives you an unfair advantage?"

我们会问的第一个问题是：“你们的与众不同的优势在哪里？”

youdao

The idea is to give every candidate an equal opportunity, and prevent well funded politicians from gaining an unfair advantage.

VOA: standard.2009.07.27

Well, its competitors have a complaint: that its tax-exempt status gives it an unfair advantage.

FORBES: Crossbreed

The government says it's about levelling the playing field rather than giving disabled people an unfair advantage.

BBC: Why aren't more disabled people becoming politicians?

Yes, Workday has an unfair advantage since it has been picking-off former PeopleSoft customers!

FORBES: Workday: Getting an $85 Million IPO Insurance Policy