I am preparing for my "Platform App Builder" Exam myself using the Study guide and various study materials from Google/Internet after passing Admin exam.

Recently when I checked the study Guide for the "Platform App Builder Certification" most of the topics were already covered in "Salesforce Certified Administrator" but with different weight-age and except on a few topics. It would be great if anyone can guide on if it will be helpful to attain Platform app builder if already passed Administrator exam and highlight on differences between App Builder and Admin exam.