The 1950 version of Orson Welles' Macbeth different from his 1948 version in a number of ways, but one of the main ways is in the accents. The 1950 version overdubbed with accents that sounded significantly less Scottish than those in the 1949 version. Thanks to the recent release of the Olive Signature Blu-ray of the film, we can compare those accents.
I have taken the "Was the hope drunk" sequence and provided it in the three film clips below. The first provides the 1948 Scottish-accent versions. The second is the less-Scottish 1950 version. And the third provides the first section of the exchange with side-by-side speeches. In each case, the 1948 version will come first.
The 1948 Version.
The 1950 Version.
The Side-by-Side Comparison Version.
Links: The Film at IMDB.