I thought the pieces used this year looked slightly different to what I had seen for the recent past championships. Still the same basic design but slightly different.
Types of sets used in World Championship

1st Chess Olympiad 1927 London
Staunton Chess Set (Jaques of London) 1920-1930s.
Chess pieces played at the 1927 Chess Olympiad
The 1st Chess Olympiad took place between 18 and 30 July, 1927 at the Westminster Central Hall, London, United Kingdom.
The 1st Women's World Chess Championship also took place during the time of the olympiad.
Source: Wiener Bilder, 31 July 1927, page 6. Our correspondent identifies the photograph as taken during the first round of the 1927 Olympiad in London (Austria v Finland, with S.R. Wolf (White) and J. Terho in the foreground).
Katarina Beskow (left) plays Agnes Stevenson. This is a posed photo as neither was due to play each other on the day that it must have been taken, 18 July 1927, which was the first day of the inaugural Women's World Chess Championship tournament at Central Hall, Westminster, London. Photo from the Daily Mirror, 19 July 1927.
The photo clearly shows the chess pieces that were played at the 1927 Chess Olympiad, and at the Women's World Championship 1927.

5th Chess Olympiad 1933 (Folkestone)
Staunton Chess Set (Jaques of London) 1920-1930s.
Chess pieces played at the 1933 Chess Olympiad
The picture above is the Folkestone Herald, and the report covered a full double page each week.
Folkestone Chess Club
William Albert Fairhurst - Mir Sultan Khan
Folkestone Chess Olympiad (1933)
https://www.chessgames.com/perl/chessgame?gid=1982033
Savielly Tartakower - Isaac Kashdan
Folkestone Chess Olympiad (1933)
https://www.chessgames.com/perl/chessgame?gid=1281047
Was it the same set again this year it looked like it