As I understand in your question if one graduated from a university or college in UK or America have a factor? I don't think it has any factor. Based on the EG7 guide, what matters is how many years of total education you have, how many diploma you received, do you have finished masteral degree or in kind. Even if you graduated from the University of Timbuktu as long as you meet the education requirement in the guide ;D (correct me if my interpretation of your question is wrong)