title_body: Is there a taste or texture difference between gravity breweries and those that use pumps?
upvoted_answer: Directly not. Agitation won't change the properties of the beer enough as such. BUT... when pumping, it is harder to avoid oxygen/air being mixed into the wort/beer. Oxygen is very bad for the beer in most stages of the brewing process. So if you have a pumping system, it needs to be a good one that doesn't wirl air into the wort/beer.
  
  The only stage in the brewing process where you actually want as much oxygen/air as possible is when pitching the yeast. At every other stage you will get oxidation which is one of the top reasons for off flavours, stuck fermentations, etc.