I have both, the beta and the regular facebook, I'd like to know if there are any problems of deleting the regular app since the beta is faster in my opinion.
you will have no problems (if you have wp8.1 dev preview , keep the stable one , since its integrated with people hub ) where as beta seems to be faster :wink:
if you're on 8.1 the regular one is needed for OS integration.
I'm keeping both until they update the Beta for OS integration then i'll delete regular.