In theI do believe that you have your numbers backwards? Nice to know that I'm not the only dyslexic Q builder :-)
If the Q had been
Maybe not. My carbon rod LS-1 Quickie canard weighs virtually the same as my per plans GU canard. The cores were more "dog boned" than I would have liked and I did not vacuum bag. I also used more material than needed so I wouldn't have to do as much fabric cutting. I'm guessing that if I used perfect cores, optimized the skin layup schedule and vacuum bagged I might be able to shave off 5 or 6 pounds.
As for time involved I'd say that it was about the same (not counting design time). If I were to do a second I could make some more user friendly jigs to speed things up a bit.
My carbon rod canard IS considerably stiffer. Stronger? I'd have to test each to destruction to be sure. I don't plan to do so.
Price from AS+S for the rod I used, as of last night, was a touch over $300.