Canon - RF 100-500mm f/4.5-7.1L IS USM vs Sony - FE 135mm f/1.8 GM vs Tamron - 150-500mm f/5-6.7 Di III VC VXD

Pick the Tamron - 150-500mm f/5-6.7 Di III VC VXD if you want the highest-scoring choice on raw spec strength. The lead is narrow (2.6 points), so the runner-up is a fair alternative if its specific strengths fit your use.

Pick the Canon - RF 100-500mm f/4.5-7.1L IS USM when you want the same overall quality at a likely lower street price — the score gap is small enough to be invisible day-to-day.

Pick the Sony - FE 135mm f/1.8 GM only if its specific strengths align with what you need — it sits well behind the other two on the Mars Score.