Which is actually worst. Your now paying dues on 110 points rather than 100. Assuming you actually are buying the fixed week to use it, the purchase price would be the same in both scenarios.
1) 100 x (188 x 1.1) = 20,680
2) (100 x 1.1) x 188 = 20,680
So your effectively paying $206.80 PP for Riviera, and paying dues on 110 points, but really only getting 100 points of "value". I can see the value for some who really have to travel at the same time every year, to the exact same resort. My take on OP's post was that they were kind of treating it like a free add-on. They didn't need the fixed week, but why not take it if it's offered?
Actually the math is NEVER the same. (as you pointed out)
You are BUYING 10% more points, so while the upfront cast is the same, the annual dues are more every year. the cost of ownership is more.
In once case, the OP is talking about a studio at CCV is December, they absolutely need a fixed week in that case. They are going to have a very hard time getting any other resort at 7 months for DEC.
So I disagree with your value statement. If you want to go, in December, and stay at a studio at CCV, then just buying the number of points needed has virtually no value, because you are going to have a royally difficult time getting that room, and unless you want to start walking it a month or more out, you will in all likelyhood not get that room more often then you will.
Now, Riviera in Sept....that is PROBABLY a different story, but we will have to wait and see.
Remember, a fixed week is not really a fixed week, it is a "guaranteed reservation". If you find out you do not need that guarantee you can cancel the reservation, turn around and re-book it and keep the extra points, in which case you get the "full value" of all the points.
And you should do need that, then yes, you paid extra, but you got what you wanted - the room you want when you wanted.