I didn't have much trouble distinguishing between the sisters, but found it hard to maintain my interest when I saw the film on Youtube.
Scott and the locations looked great, and the colour was excellent for 1947, but there were too many implausible situations, starting with the opening gunfight and Inskip's intervention when Kane was about to hanged. Unarmed Kane kept on putting himself in situations of extreme hazard, characters seemed to be able to find each other without any trouble and the wrapping up of the legal technicalities at the end was far too neat.
Scott (or his double) suffered a couple of bouts of rough & tumble with little apparent damage to his clothes. Kane's brutality in getting a confession (for what it was worth) out of Yount was surprising for a 1947 film.
A rather long 84 minutes.

It was the same for me: I too enjoyed the movie but also had to keep pressing the play back button to keep clear which sister was which.
The film is well worth the watchan above average western for sure.