Vacation in Nicaragua or Sri Lanka? ?

I’m taking a month long vacation in April, but I can’t decide between these two countries, I already bought tickets to Sri Lanka months ago but have been thinking about switching to Nicaragua because my tickets are refundable. I originally chose Sri Lanka because it’s very safe for solo travelers, but I’ve heard nicaragua is pretty safe too. Sri Lanka was also more intriguing to me just for the simple fact that it’s in the other side of the world and so it seems more exotic. But Nicaragua looks beautiful and I’ve never been anywhere in Latin America. Any input from people who have been to one or both countries would be greatly appreciated