I love L&H but I'm baffled why this was chosen to represent them, they seem almost peripheral in it. The visual humour is okay in B, but it was a couple of zingy one-liners from Groucho that made me laugh.
Oh ffs Well of course B is better – Fra Diavolo, man? What possessed you? – but I'm not voting against stan and ollie, even if operatic stylings are involved. JC's right, B is all about the pay off, but that's beautifully done.