Utilitarianism and deontology oppose one another on many forums. However, it should be noted that these moral theories only are two of five known theoretical approaches concerning bioethics. Therefore, one cannot necessarily formulate straightforward comparisons between these opposing theoretical approaches as they ultimately comprise only a small portion of a relatively broad topic.
The main opposing theme, as mentioned earlier, is that utilitarianism is more consequence-oriented in character, whilst deontology is not. Fundamentally, this might lead to disastrous consequences in deontology and utilitarians would further argue that the outcome of ten deaths is much less desirable than one.