The whole thing is moot.
Percona Server does what MySQL does (100% compatible), but does it right, fast and while using less resources.
In many ways it's like Maria, only taking it one more step.
After doing extensive testing in our test environment to ensure it's as compatible and easily interchangeable as it says on the tin, I was able to swap out our production MySQL for Percona in about 2 minutes. I timed it in such a way that I was able to do it during production hours without noticeable downtime.
So yeah, if you're going to swap out MySQL, swap it out for Percona.