Angular Directive Different Template

Angular will accept a function as the template option, so you could do something like so:

.directive('myDirective', function () {
    return {
        templateUrl: function (tElement, tAttrs) {
            if (tAttrs) {
                if (tAttrs.type === 'X') {
                    return 'X-template.html';
                }
                if (tAttrs.type === 'Y') {
                    return 'Y-template.html';
                }
            }
        }
    }
});

For more info, see the documentation for the $compile service.