You mean Cubans, Puerto Ricans and Dominicans? We would usually think of them as Latin American, though
In any case, the three groups are very different - and generally do not like each other. Furthermore, there is a difference between the populations and home and in the US. In the US, of course, Cubans are the most Republican of all the Hispanic groups. In contrast, Puerto Ricans and Dominicans are very Democratic (just check out the voting patterns in East Harlem, for Puerto Ricans, and in Washington Heights, for Dominicans).