Researched from the sources below. This is not a hands-on road test.

Are these really the same specifications?

First ask: which year, engine, gearbox and market? Then ask: are the units and test methods the same? Mechanical horsepower and metric PS are not identical, and 0–60 mph is not 0–100 km/h. Keep original units visible when checking a claim.

Carioo identifies the variant and market on every seeded car page. Missing information stays missing. An empty field is more useful than a confident number borrowed from a different version.

What job must the car do?

The third question is about your life: which journeys and passengers are non-negotiable? The fourth is about ownership: can you obtain servicing, tyres, insurance and charging where you live?

Use a short list of requirements before assigning priorities. A car that misses a must-have cannot become the right choice merely by winning three less important categories. Compare costs using the same distance and time period.

What evidence would change your mind?

The fifth question prevents a comparison becoming a defence of the car you already want. Decide what you need to verify: an inspection, a local service quote, a child-seat fit or a test drive.

Read owner accounts in context, with duration and mileage. Keep independent safety results separate from enjoyment or research scores. When you save a comparison, save its assumptions and sources too; that is what makes the decision explainable later.

Sources and methodology

BMW: M3 variants and power differencesHonda: European Civic Type R specification
Explore the tools