Interest income vs partnering on flip

[Bryan H.]

I know there are lots of "depends" answers but hoping you can help. Let's say a retiree is going to fund a flip. From a tax perspective would it more beneficial to be the lender have the returns be considered interest income? Or would it be better to be a partner and split the profits? In the end, the amount to the retiree would be the same. Just wondering which way would be better to structure the deal.