The vote dialog occurs every day when app thinks you're idle in the app. The vote reappears until you successfully vote. You cannot get a different choice by dismissing a vote. It will reappear.
You have to decide between two painted badges, which one you like more.
For that you have 6 options:
EQUAL
1
or 2
points 1
or 2
buttonBadge votes are accumulated and transformed into the Badge Parade. Votes are generated, so that one sees maximally many different badges. System takes care, that you never rate your own badges and your votes are distributed evenly over created badges and badge creators.
The ratings influence if and how many monthly diamonds their creators and holders receive.