my guess is that the longer fitting is a replacement.
It looks to me like they had to shave down that end to get the smaller diameter/longer fitting on the pole. I can see myself doing something similar.
but the end with the shorter fitting looks like it wasn't hand-shaped and even all around.

the longer one looks like it might be better on the clew of the sail, since it looks like there are fewer sharp edges (unlike the shorter fitting).

just a guess.