When comparing Planets vs Ball O'Clock, the Slant community recommends Planets for most people. In the question“What are the best custom Android Wear watch faces?” Planets is ranked 1st while Ball O'Clock is ranked 48th.
Ranked in these QuestionsQuestion Ranking
Pros
Pro Two themes to choose from
Pro Displays the actual current positions of the planets
The watchface collects NASA data and uses it to put planets in their appropriate places.
Pro Customizable
Colors can be customized as well as the battery indicator
Pro Animations
The animations of balls dropping and rolling and the slides rotating makes it fun to watch
Pro New concept of telling time
The concept of telling time through ball stacking is a new concept for watchfaces that makes it unique
Cons
Con Initial spin makes it hard tell time with a quick glance
Each time checking the watch all the planets spin wildly before settling into position. It can be distracting and arguably unnecessary.
Con Eats up battery life
Eats the battery at about 3 times the rate of the standard watch face.