Here's an in-depth comparison of the COROS APEX vs. APEX 2, written by a marathoner and GPS watch nerd who's owned both!
Coros Apex 2 Pro Review: For Practical Outdoors People
COROS APEX 2 and APEX 2 Pro In-Depth Review
Coros Apex 2 and Coros Apex 2 Pro review: Pinpoint accuracy
Coros Apex Review: Great Battery Life and Design But Limited Tracking
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Reviewed: The Newly-Upgraded Coros Apex 2 Pro – Triathlete
COROS APEX 2 Pro Review
COROS APEX 2 review
Coros APEX 2 watch review
COROS Apex 2 vs Apex 2 Pro: What's the difference?
COROS APEX 2 & APEX 2 Pro In-Depth Review: Features, Tested, Accuracy!