That said, where there exists a measurable difference between an implementable approximation of utilitarianism and an implementable approximation of some other moral principle X, then it makes sense to consider oneself a utilitarian or an Xian even if one is, as you say, accepting deviations from utilitarianism or X in order to achieve implementability.
That said, where there exists a measurable difference between an implementable approximation of utilitarianism and an implementable approximation of some other moral principle X, then it makes sense to consider oneself a utilitarian or an Xian even if one is, as you say, accepting deviations from utilitarianism or X in order to achieve implementability.