Error tracking vs APM-with-errors
Sentry's error grouping, source maps, breadcrumbs, and release health are more polished than New Relic's error tracking.
New Relic's APM provides errors as part of a broader transaction view — fine, but less specialized.
If your team debugs React 'Cannot read property' errors daily, Sentry is more ergonomic.
If your team debugs service-level latency and infra incidents, New Relic APM gives richer context.