Compare Syndication Vs. buy and hold

[Hernan Guelman]

When I look at 2 main strategies: investing in a syndication deal, that has 16-20% IRR, I get to normalize that into meaning ~16% yearly growth of my money, meaning doubling the money in around 5 years. 20K in -> 40K out.

When I compare that to buy and rent deals, there are CoC and Cap rate numbers but I struggle to compare that to the simple syndication deals. Anyone can give me a good and simple formula or strategy to how you compare one strategy to the other?