Can someone tell me if they can tell a difference in the shaves when using a Gem Junior 1912 and Gem 1912? Thanks.
You shouldn't be able to see any difference in the performance of the two razors, assuming both specimens are in good condition. . . .
If they have different styles of handles, however, you may find something of a difference in the way they shave simply due to the way you may be gripping the razor or due to a slight difference in weight. If you interchange the handles, you should be able to prove this to yourself.