Condenser differences?

I have a highly technical question-
I see condensers with a regular wire, and I see them with a large copper strap. Why? What are the differences(besides one has a wire and one has a strap)? My 2bbl 273 Dart still has the original installed at the factory in November 1968 and it's the strap-style. I seem to remember that either or both my '66 383 Chrysler and '68 Slant used a wire-style. All are single-point Chrysler built units.