I was in Jamaica 11 years ago and found plain not spiced Captain Morgan that is not stocked in the US. It was pretty good but I prefer Appleton in Jamaica, and Mount Gay in Barbados; of course the unspiced versions.
And yes, there is a difference in Red Stripe. If it says Imported on the bottle send it back just like the locals do and say, "no Mon"
Oh, I don't drink anymore but still can offer advice.