Both phones share a broadly similar physical profile — neither folds, neither is ruggedized — but there are meaningful differences beneath the surface. The Poco C71 is noticeably lighter at 193 g versus the M7 Plus at 217 g, a 24-gram gap that is genuinely perceptible during extended one-handed use or long calls. The thickness is virtually identical (8.3 mm vs 8.4 mm), so neither phone feels bulkier in a pocket. The C71 is taller and narrower, while the M7 Plus is shorter and wider, meaning each suits a slightly different grip style — the C71 favors a longer hand, the M7 Plus a broader one.
Where the two phones diverge most significantly is water and dust protection. Both are rated water resistant, but the M7 Plus carries an IP64 rating — fully dust-tight and protected against water splashed from any direction — while the C71 only achieves IP52, which offers limited dust ingress protection and resistance only to dripping water at a narrow angle. In practical terms, the M7 Plus can handle rain, splashes, and dusty environments with far greater confidence, whereas the C71 offers only basic incidental protection.
On design, the Poco M7 Plus holds a clear advantage due to its superior IP64 rating, which meaningfully extends its durability in everyday real-world conditions. The C71 counters with a lighter build, which improves ergonomics, but that benefit is outweighed for most users by the M7 Plus's stronger environmental protection.