Thanks for the explanation!
I was also considering the Fusion Street saddle, but I assume that it’ll be made out of the same material as the Freeride.
Yes, I’ve seen the difference, but I really like the colors that the Mad4One is available in, and the QX is made out of 6061 aluminum whereas the Mad4One is 7005 aluminum. Since 7005 can be used to make lighter frames and it isn’t lighter, it has to be stronger (assuming that it has been designed properly). It is also reinforced at the crown to prevent breaking the frame.
Although I have some experience with building wheels, and I have all the equipment in house to build my own wheels, I don’t think there’s much to gain here from doing it myself as I expect that these wheels are already hand built to begin with.