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

OEM Dyson V11, V15, V15s Hepa Filter Replacement 970013-02 Purple

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Adapted For V11 Sv14 V15 Sv15 Parts 970013 02 Hepa - Temu Canada

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For V11 SV14 V15 SV15 Parts 970013-02 Hepa Filter Replacement Cyclone Absolute Animal Cordless Vacuum Cleaner Accessories (Color : 1Pcs Purple) : : Home & Kitchen