First thing I notice in hype is the use of multisyllabic (long) words to describe the same object where a simpler word will do. IPD spends loads on marketing; sometimes they've found a unique product to offer, but other times they have the same "stuff" as the others to peddle.

You can know the difference for sure and buy both to compare, or find someone else who has (rare), or possibly call the suppliers and get them to give you their sources from where you could obtain durometer and dimension specs. Then you'll be the bushing master.