Really a “World Class” model?

Looking at purchasing this King size “ Beautyrest World Class Grandeur 2.0 Plush “ mattress that’s at the max of my budget. Aside from what’s available on the Leon’s Website, I can’t find any further information via the Beauty-rest site or google. For those experienced in the mattress department… Is this truly a “World Class” model or a Harmony model in disguise? Does it matter quality wise or would you say it’s the best within my budget ($1500 before taxes). Coil count seems reasonable but I have little understanding about foam quality as it’s overwhelming. There was no exact model to try in store but we “tested” the closest floor model. Any advice appreciated.

Link to mattress: https://www.leons.ca/products/beautyrest-world-class-grandeur-2-0-plush-mattress-collection/king?size=king