What is the difference between purple and blue post HEPA filters for V15?

My V15 came with purple filter, but in the replacement parts catalog I can see 2:Blue 970013-03 Purple 970013-02Is there any difference between them except the color? Why only blue one has “HEPA” mentioned in its name? Does it mean purple isn’t a HEPA filter?Would be nice if someone could clarify th

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Genuine Dyson V11 V15 V15s SV14 SV15 POST FILTER Purple OEM Part # 970013-02

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Dyson V15 Detect not HEPA!? Dyson website indicates you must buy their website exclusive model, the V15 Detect+ to get HEPA filtration. : r/dyson

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