Studd was sheer brute force. He was a big, impressive and intimidating guy no doubt about that. Studd, however, I don't believe was as strong as Davey Boy. I remember back in the 90s, back when Davey and Lex Luger and formed a tag team back in the WWF, Mabel, better known now as Big Daddy V, was on his back and had him in a kind of nerve lock. Smith got up onto his knees and hoisted Mabel up on his shoulders and gave him the electric chair. Now, reportedly, Mable or V or whatever you wanna call him was heavier then than he was during his last run in WWE.
Davey had strength, speed, athleticism...Studd's outmatched here overall. Even though he was roughly a foot taller and about 100 pounds heavier, he's just outmatched here. At the very least, Davey is his equal in strength and strength was all Studd has. Davey takes this in probably about the 10 minute mark.