All are excellent tools; however, success comes only if the operator reaches a decent level of knowledge and skills, also experience makes the difference.
bu-rp always come with the latest's version and the same loader work for ayear or two.
Acnx it's not always available as well AppS.
depending on the complexity of the análisis they have advantage or not over the other, for just examine through the proxy I prefer Fiddler, free simple and has the same functionality for a basic analysis, sometimes you need to do your own addon to archive results.
for a short answer: B_urp its always available, has powerful automation and there is a lot of info on it, you can choose flavor as JMV or Binary, for sure its one of the top 10 MUST HAVE tools.
Kr.