Does the Barron's edition matter anymore?

So, I’m looking to buy Barron’s SAT Biology 4th edition because it has some amazing reviews on Amazon, but the newer version is the 5th edition and that might be all that’s available in Barnes and Noble. Would the 4th edition be outdated in any way that might hinder my SAT Bio subject test score? I don’t see how, but I’d like to ask before I do anything.

Bump.