Manufacturers are regularly cryptic about what WDR support they actually provide.
They invent marketing buzzwords. They self assign dB rating that cannot meaningfully be compared across manufacturers.
In IPVM's testing, the key differentiator we have found is support for 'true' multi-exposure WDR (see our WDR Guide for background), instead of 'fake' digital / software only WDR. Also, check out our WDR Mega Shootout with over 20 cameras tested and compared.
To provide some clarity we have compiled this "cheat sheet" for many camera manufacturers, detailing what is and is not a true WDR camera.