Does buying the 2024 PHB still let you use the legacy 2014 option when making a character?

I'm about to play an in person dnd game using 5th edition 2014.  Dndbeyond seems like a good way to make a character and keep track of it during the game.  Does buying the 2024 edition give me the 2014 options when making a character, or should I just buy the 2014 version?

Yes you can, make sure you select 2014 AND Legacy at the start of character creation.   
And make sure to scroll down to select 2014 classes and species, subclasses. 

Currently you can't turn off 2024 content showing as well, so you'll see double listing of some things like 
Cure Wounds and Cure Wounds Legacy for spell casting.  Legacy is the 2014 version.