My Maravia is heavier than my Sotar. It is 1.5 feet longer, 2" bigger tubes, has a 5 bay frame with floors, drybox, drop bags, etc.. My sotar is light because it has a minimalist frame that weighs 36 pounds.
If you are comparing equal size tubes the different will be minimal. The shapes all work, I really think the differences do not amount to much on the water. If you are getting a larger boat, the difference in weight will amount to nothing. If the tubes are different by 20 pounds, that might mean something on a stripped down boat, but if it is a loaded multi day boat it won't make ANY difference.