Assuming this is for a business where you eventually plan to make your living, or a substantial part of it...................
Does that not answer your question? Get both. Build on the correct spelling, forward the mistype to it. If in a few years there is no traffic to the mistype you could consider dropping it, but I expect you will need it.
If you are buying for selling the domain later, I doubt a reg fee domain would be good enough for that kind of protection- and you would have to convince the buyer of the regular name to take both. So it is a different answer, depending on why you bought the domain.
/////WARNING TO NEW VISITORS\\\\\
DOMAINING IS AN ADDICTIVE PRACTICE.
OVER-USE OF THE "BUY" BUTTON CAN CAUSE SEVERE EMOTIONAL AND FINANCIAL DIFFICULTIES.
THERE IS NO "SAFE" DOSE OF DOMAINS, PEOPLE HAVE BEEN SWEPT AWAY BY WHAT THEY BELIEVED TO BE INNOCENT GENERICS.
SIGNS OF INFECTION INCLUDE FREQUENTLY CHECKING AVAILABILITY OF PHRASES YOU HEAR IN CONVERSATION, BRAGGING TO MYSTIFIED FRIENDS ABOUT "SNAPPING A KILLER LLLL", AND DREAMING ABOUT NEW GTLDS.
THERE IS NO CURE, HOWEVER EDUCATION HAS BEEN SHOWN TO IMPROVE THE CHANCES OF A SUCCESSFUL OUTCOME.