title_body: Is there any meaningful difference in acidity level between beer styles?
upvoted_answer: Sure, there are major differences in acidity. Unsurprisingly, the sour beer styles can have very low pH levels. Here's an example of someone measuring the pH of sour beers and finding that even within that category there are significant differences. Here's a short presentation showing that expected pH ranges from 3.2-3.4 for Berliner Weisse to 4.5-4.8 for pilsner and bock. So, yes, there are definitely major differences, and they do matter to the perception of the finished product. At the most obvious level, low-pH beers actually taste sour. There are also indications that smaller pH variations matter to how people perceive the flavour.