Sabbath was so far before my time that I never got into them. My first exposure to Doom was from a Hard 'n' Heavy VHS from '89/'90. It had an interview with Candlemass. At the time I thought these dudes were total clowns, that particular Hard 'n' Heavy also featured Heathen, Testament, Exodus, and I believe Laaz Rockit, stuff that I was more into. It wasn't until later in life that I learned to appreciate Doom.
Here is the Candlemass clip from Hard 'n' Heavy 7.