Garmin - Fenix 8 Solar (47mm) vs Polar - Pacer Pro

The Fenix 8 Solar (47mm) is the clear pick on raw spec strength, leading by 18.7 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the Fenix 8 Solar (47mm) if you care most about smartwatch mode and gps mode. The biggest gaps in its favor are smartwatch mode, gps mode, multi-band gps, among others.

The Pacer Pro similarly doesn't carry a headline advantage on the popular specs — look at the full table for category-specific deltas.

There are no meaningful ties on the headline specs — every popular-comparison metric has a winner.

Bottom line: the Fenix 8 Solar (47mm) is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.