Have not been to either, but have read about them. There is no charge at Paradise Beach to use the chairs/umbrellas, but they, like any "free beach" will expect you to buy some food drinks (no minimum). For $5, you can get a wristband that gives you unlimited use of their water toys (kayaks, snorkel equipment - although the snorkeling is not that good there - floats, water tramp and iceberg). Nachi Cocom has different "plans"; you can get in free and, again, just purchase food/drinks, or there are pre-paid plans for unlimited food and drinks. If you purchase on line, in advance, it is a better deal. There are other posts about this place with better details.