I believe they are one and the same, yes. Only the players in all the S1L7 moats (sans Gordian Knot) had to rely on upper body strength to get across the moat. Then their partner had to throw a rope to the person already across. The S1L3 moat was a player swimming across the moat with a rope, then tie it to the poll so their partner could cross. But it is the same concept really. And some of these players did not have the upper body strength, at all.