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

NEW ORIGINAL Dyson V15 SV22 Detect Vacuum Motor HEPA Replacement Filter

Artraise Filter Replacement for Dyson V11 Torque India

Fit For Dyson V11 SV14 V15 SV15 Parts No. 970013-02 Hepa Filter Accessories Cyclone Absolute Animal Cordless Vacuum Cleaner

LifeSupplyUSA Replacement Dyson DC-25 Pre-Motor Filter and Post Motor HEPA Filter Complete Kit ER127 - The Home Depot

Filter Cleaning - Dyson V15 Detect

Filter Replacement for Dyson V11 Torque Drive V11 Animal V11 Extra V15 Detect Cordless Vacuum Cleaner, Compare to Part 970013-02 (3 Pack) : Home & Kitchen

Dyson V15 Detect Absolute first generation on sale, what's the difference? : r/dyson

Clean Dyson V11 Filter, Clean Dyson V15 Filter

Filter Replacements for Dyson V15,V12,Filters Compatible with Dyson V15 Detect,Detect+,V12 Detect,Nautik,V11 Torque Drive,V11 Animal Vacuum Cleaner,Blue,2-Pack : Home & Kitchen