I don't have time to post fully on this, but in I experience it is not only differences between Yankee and Yardie Rastas, but between the different countries in the Caribbean, not to mention Africa.
In my experience for example Guyanese Rasses tend to be less "fundamentalist" (for lack of a better word) than the majority of JA Rasses I've met. There are quite a few differences of doctrine and opinion amongst G.T. Rasses, on the identity and significance of Selassie I, on the importance of race (in Guyana and Trini there is the added element of African/East Indian conflict of course), repatriation, whether or not the Bible is the basic foundational guide, etc. Well I got to go, any reasonings on this?