Salomon 9 vs Carbon

OK, I'm in the market for new striding/classic boots. The boots I have were
top of the line about 10 years ago. I ski about 75 times per year, about
1/3 of that striding. I race only a few times per year and am middle of the
pack in the 50+ age category.

I understand and fully agree with the principle that fit is the most
important thing.

I currently am on the Salomon system so am looking at the 9 (yellow) and
carbon (grey). Other than $100, what is the difference? Obviously the
Carbon's are lighter, but how much? Are there any other characteristics
that are significant (e.g. ease of use, flex, overall support). As I said,
I do race a *little*, but mainly like a "performance" boot just because I
like the feel and function of good equipment. Since I ski a *lot* and
really only buy new equipment when I need it (every 10 years or so), I am
not adverse to spending the extra $100, but not if it is something that
really doesn't suit me. Comfort is important, for example, and it kind of
looks like the Carbon might be less comfortable and more difficult to use.

As a related question, I see that the current yellow and black 9's are
colored opposite to what they were before the carbon came out. (e.g.
whatever parts used to be yellow are now black and vice versa). Other than
that, I can't see any difference between the new 9s and the 9s of two years
ago - is there any difference other than switching the black and yellow in
the color?

Another boot that I've seen on the Salomon system is the Sportful. They look
like decent boots but are quite a bit cheaper. I can't do side by side
comparisons w/ Salomon, and can't find info on weights for any of these
boots. Any experience with these?

Finally, I might just take the plunge and switch systems. Are there any
relative advantages to the top of the line Alpina or Rossignol (the only
others available locally). Here, both of these boots are significantly
(~$50) cheaper than even the Salomon 9's - and of course closer to $150
cheaper than the Carbons. One observation I've made is that the Salomon
9's, while no longer the "top of the line" for Salomon - are still at the
quality and features level, or even above, of the "top of the line" in
Alpina and Rossy - is this true?

Thanks for your help.

Grizzy