I am trying to train powerlifting but I have total respect for bodybuilders and the sacrifices and discipline they have. The gym I go to is a total BB gym and a lot of the guys are decent enough blokes but of course there are a few a-holes as you would expect anywhere.
Most of these BB'ers are very strong as well as looking muscular so no one can tell me that a bodybuilder ain't strong. And no one can tell me that a powerlifter can't have muscle because when you are training hard and eating right, muscle has to come, simply because of the strain you put on your body plus the nutrition you use to feed it.
And the answer the question: Both are incredibly impressive.