I recently sold a 9 cog 11~34 cassette. According to the product code (CS-M580) on the cassette lock ring, the cassette (or at least the lock ring) is supposed to be a Deore LX component. However, the buyer claims the cassette is just a lower spec'd "Hyperglide" cassette (Deore instead of Deore LX)!??

I purchased the cassette some time ago from a reputable dealer, but I don't recall the specific model that I purchased, other than it was a "Deore".

How can you tell for certain whether the cassette (cogs) is either a Deore component, or a Deore LX component??