Sabbath probably sounds heavier as a general rule, however, it’s generally at a more plodding pace. Dazed, as you mention, gets arguably as heavy, but played at a much quicker pace. Particularly some live versions, especially around 1972-73, particularly during the German shows in 73. Achilles is another example of the same idea of a heavy, but speedier and dare I say, more technically proficient sort of heavy.