Published changes versus Google Pixel 8a (2024) include a body size change of +2.6 mm height and +0.6 mm width. These are specification differences, not measured real-world scores.

An upgrade is easiest to justify if you care about a body size change of +2.6 mm height and +0.6 mm width. If those areas already meet your needs on Google Pixel 8a (2024), the move is optional rather than urgent.

Google Pixel 9a (2025) fits buyers looking for a mainstream phone size and people moving up from Google Pixel 8a (2024). This is an editorial reading of size and published differences, not a personalized recommendation.

Keep Google Pixel 8a (2024) if you do not need the listed generation changes. Moving to Google Pixel 9a (2025) makes more sense when the listed upgrades match what you actually use.

The clearest published improvements are a body size change of +2.6 mm height and +0.6 mm width. Treat these as catalog differences rather than ranked review scores.

Against Google Pixel 8a (2024), the catalog does not show obvious trade-offs such as a higher launch price or a clearly heavier body. That does not mean the device is flawless—only that those drawbacks are not evident in the compared specs.