There are some significant differences between the US edition and the later UK edition, though they do not affect the main plot.
Something New includes a lengthy scene in which Baxter finds a paint-splashed lady's shoe in the library after the theft and attempts to identify its owner: this scene was omitted from Something Fresh; Wodehouse had previously used the same sub-plot in the second part of the school novel, Mike.
In Something New, Ashe Marson, Joan Valentine and George Emerson are Americans; Ashe (who comes from a town called "Hayling", near Boston, Massachusetts) and Joan (who was born in New York) are living in England, while George is a member of a New York law firm. Because of the change of nationality, there are numerous consequential changes in descriptive passages and, particularly, in the dialogue.
Hayling Island is a peninsula on the South Coast very near to Emsworth.
The 1972 US paperback edition published by Ballantine (still titled Something New) contains the text of the original UK edition of Something Fresh.
Read more about this topic: Something Fresh