Yes, the one with the brace on the stinger is made from thin, butter-soft aluminum, and the one without the brace on the stinger is made from thick, solid aluminum.

The one with the brace on the stinger needs it because it's so soft that if you press your thumb on it, it will turn into a taco-shell.

In case you wonder, yes, I did make the mistake of buying the one with the brace on the stinger, thinking it was the same. But alas, they are nothing alike except for the efra number