This is the place to ask questions about specific tools. Please search for other questions about your subject before you post a new one... it may already be here. Also, please include pictures if possible to make identification easier.
Forum rules
Please make sure you've read the Rules and Etiquette Page, which spells out the rules and guidelines of this forum.
There is a difference in these extensions. The top one is 1929 and the bottom one has no date code, would date it mid 20s.
There is a difference is size, but this is not to uncommon from tools from this era to have a 1/2 inch or so diff length. The main diff is the location of the grip, and the width, the later grip is 3/4 in width, and the early one is 7/8 in.