1. Omnitrix:
- The original Omnitrix, as seen in the Ben 10 series, features a sleek and compact design.
- It resembles a watch with a green or white center and a black or gray body.
- The Omnitrix has an iconic circular shape and a symbol that represents the series.
2. Ultimatrix:
- The Ultimatrix, introduced in Ben 10: Ultimate Alien, has a more intricate design compared to the original Omnitrix.
- It features a larger size and a more complex shape, resembling a combination of a watch and a gauntlet.
- The Ultimatrix has a black and green color scheme, with various buttons, dials, and lights indicating its advanced features.
Ultimately, the decision on which device looks better is subjective and varies from person to person. Some may prefer the classic and iconic design of the original Omnitrix, while others may appreciate the more advanced and intricate appearance of the Ultimatrix.