Are expensive nail parts somehow different?

I recently took up nail art as a hobby.

I go to the salon to get my nails done once every four weeks.

I only receive designs without parts.

Today, the designer Nail parts Many uploaded designs

They showed me and recommended something!

So I asked about the price, and they charge per part.

Is Swarovski the expensive one? Brands like that are quite expensive per item!

They said there are cheaper ones too.

Are expensive parts somehow different?

Is it a slightly more radiant difference, or something like that?

Nail experts, please let me know!