With regard to THE GLASS KEY, I much prefer the original with George Raft.
True, Raft was no actor, but he did have a strong "tough guy" screen presence that, in my opinion, Ladd lacked.
Frankly, if it wasn't for SHANE, I think that Ladd would be totally forgotten today.
On the other hand, Raft is more remembered, not necessarily for any particular role, but as one of the major icons (along with Cagney, Robinson and Bogart) of the gangster film.