Unless the quality is comparable, comparing prices is meaningless.
I think that's silly. In our lives we make comparisons all the time between price and quality. If you go into the meat department in a grocery store and a pound of ground beef was the same price as a 16 ox. angus ribeye, would you say that the price comparison is meaningless because the qualities are not comparable?
If you are making travel arrangements, and you decide that the added cost of a first class ticket is worth the price difference for a coach ticket, you've made a comparison between price and quality. Same thing if you decide that the difference in fare for first class isn't worth the price difference. Same thing when you're car shopping. Same thing when you decide whether or not TUG membership is worth the $15 price.
We make that decision when we decide to acquire one timeshare vs. another. Or when we are looking for a timeshare, and we are presented with options, we decide that some of the offerings are worth the exchange fee, but others are not.
Point being, we all make comparisons between price and quality continually in our lives. I don't believe you are an exception.
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Returning to Diamond - The Grand Hyatt is almost next door to Point at Poipu. Grand Hyatt is a classy place. I could stay there in an ocean view, 500 sq ft hotel room with 2 queen beds for one week in our travel period for $5700. But wait, we have people traveling with us - DD, SIL, DG - they would need a room for themselves. So make that $11,400.
Or we can stay at Poipu ~100 yards away, in a 2-bedroom ocean front unit ~1300 sf, with living room and fully equipped kitchen.
Now our condo won't be tricked out like that Hyatt room - no marble in the bathroom. Shower fixtures not as high end. Beds might not be as plush. No daily maid service. Towels not as thick. Plush robes not provided in each closet. Resort doesn't have room service, spa services (but you pay for those anyway). The resort doesn't front directly onto a sandy beach.
But at Poipu we can live together as a 3-generation extended family for a week, cooking meals together, raiding the refrigerator when we want to. No obligation to try to coordinate people to get down to a restaurant at about the same time for meal.
If I had to choose between Point at Poipu and 2 rooms at Grand Hyatt for a week for the same $11,400 price, I would take Point at Poipu. But Poipu only costs me $2000 (including occupancy tax).
So there is a definite price comparison in play, even though the qualties are really not at all comparable.