I posted this already, just bringing it back to the top! Apologies for not following the rules.
We currently have both web and native implementations going to the same report suite. Web has an "Hour" dimension that takes the following format (10:00 2016-11-13), Native has an "Hour of Day" dimension that takes the following format (23).
For me, the native dimension is preferred because that allows me to compare dates based on the time of day. The we dimension is limiting because it is tied to a date so you cannot compare metrics.